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Τετάρτη 2 Απριλίου 2014
Afghan Opium Wars: Drugs win?
Afghan drug crops prosper despite burning billions in prevention. More than half of all provinces in Afghanistan are growing opium poppies. As Lucy Kafanov reports, it's taken its toll on Afghan society and far beyond.
Δευτέρα 31 Μαρτίου 2014
Japanese Whaling: Japan banned from hunting whales in Antarctic
Japan has reluctantly accepted an International Court of Justice order halting whaling in the Antarctic. Report by Sophie Foster.
Student killed in clashes with Egyptian riot police in Muslim Brotherhoo...
A student has been killed in clashes with police at the Islamic Al-Azhar University in Cairo. On Sunday, Egyptian riot police fired buckshot and teargas at pro-Muslim Brotherhood students, who were throwing stones at them outside the university. A police van was also set on fire outside the gates of the building. Those protesting are demanding the reinstatement of students who have been expelled for taking part in the demonstrations, or for belonging to the Muslim Brotherhood. The protests have intensified and are continuing into a second week, in the wake of a court ruling handing down death sentences to more than 500 alleged Brotherhood supporters. The country's security forces have launched an intense crackdown on the Muslim Brotherhood since the ousting of President Mohammed Morsi by the military last year, killing hundreds of its members and jailing thousands of others. Report by Claire Lomas.
South/North Korea Exchange Fire
South and North Korea exchange cross-border fire amid rising tensions over military exercises and threatened nuclear tests.
Full Story:
This amphibious landing exercise is the largest marine drill South Korea and the U.S. have ever jointly held.
Operation Foal Eagle takes place annually.
North Korea's condemned this year's event as a threatening military drill and said it would conduct its own firing exercise.
U.S. Commanding General Paul Kennedy insists the exercises aren't politically motivated.
[Paul Kennedy], U.S. Commanding General :
"This exercise was not designed to react to any political situation. It's not designed to send a message. This is something that we have to do to be able to inter-operate with our allies."
On Monday South Korea's Defence Ministry said the North had fired more than 500 artillery rounds, some of which landed in its waters.
The South said its troops fired back.
[Kim Min-Seok, South Korean Defence Minister Spokesman]:
"Our military fired back about 300 rounds of artillery with K-9 self-propelled Howitzers. We and the United States are working together to closely monitor movement by the North Korean army."
The North has stepped up its rhetoric in recent weeks and conducted a series of mostly short-range missile launches in response to the joint drills.
U.N. condemnation of the launches was greeted on Sunday by a threat from Pyongyang to carry out what it called a new form of nuclear test.
Full Story:
This amphibious landing exercise is the largest marine drill South Korea and the U.S. have ever jointly held.
Operation Foal Eagle takes place annually.
North Korea's condemned this year's event as a threatening military drill and said it would conduct its own firing exercise.
U.S. Commanding General Paul Kennedy insists the exercises aren't politically motivated.
[Paul Kennedy], U.S. Commanding General :
"This exercise was not designed to react to any political situation. It's not designed to send a message. This is something that we have to do to be able to inter-operate with our allies."
On Monday South Korea's Defence Ministry said the North had fired more than 500 artillery rounds, some of which landed in its waters.
The South said its troops fired back.
[Kim Min-Seok, South Korean Defence Minister Spokesman]:
"Our military fired back about 300 rounds of artillery with K-9 self-propelled Howitzers. We and the United States are working together to closely monitor movement by the North Korean army."
The North has stepped up its rhetoric in recent weeks and conducted a series of mostly short-range missile launches in response to the joint drills.
U.N. condemnation of the launches was greeted on Sunday by a threat from Pyongyang to carry out what it called a new form of nuclear test.
Obama in Saudi Arabia
Obama in Saudi Arabia: Will Riyadh really go it alone?
U.S. President Barack Obama (2nd L) is escorted from Marine One to board Air Force One as he departs Saudi Arabia to return to Washington, March 29, 2014 (Reuters / Kevin Lamarque)
Following his visit to Brussels where US President Barack Obama underscored the common values and principles shared between the United States and its European allies, the American president jetted off to meet another strategic ally. Saudi Arabia, a state that is the antithesis of those very western values that Obama passionately espouses, has been in the US sphere of influence for decades, and its opulent royal family has traditionally maintained close personal ties to American leaders. Obama’s visit comes in the midst of a policy rift that has emerged between the two allies over Washington’s policies in the Middle East, which threaten to undermine this significant economic and security partnership. The two allies appear to be strange bedfellows at first glance, but when the relationship is examined within the context of a long-standing geopolitical and economic oil-for-security partnership, lofty rhetoric about western values becomes subservient to the harmonious marriage of convenience. The American president did not raise concerns of human rights violations during his dialogue with King Abdullah, despite the kingdom’s notoriously abhorrent human rights record, which includes the severe repression of women’s rights and capital punishment (often by beheading) for engaging in apostasy, adultery, sorcery or homosexuality. The purpose of this brief visit was to reassure the Saudi leadership their grievances were being heard and Washington desires the same immediate endgame: a pliant new regime in Damascus that will be subservient to US-Saudi interests, and a weakened non-nuclear Iran.Saudi officials are highly displeased over Washington’s overtures to Iran and reluctance to strike Syria and have threatened to break away from the US sphere, but the monarchy may still see an oil-for-security partnership with the US as the safest policy.
Fraying ties
Relations between Washington and Riyadh were at their lowest in October 2013, when then Saudi intelligence chief Prince Bandar bin Sultan vowed to make a "major shift" in relations with the US in protest over the Obama administration’s decision to backpedal on plans to launch airstrikes on Syria. Members of the Saudi royal family openly derided the UN-backed deal to eliminate Syria's stockpile of chemical weapons and ridiculed Obama for failing to act when his ‘red line’ was crossed. Washington’s attempts to thaw relations with Iran have also irritated Saudi leaders, who deeply resented how US-Iranian talks had been kept secret from Riyadh. Aside from feeling double-crossed by a major ally, the Saudis believe any US-Iran agreement would bolster Tehran and allow Syria's President Bashar al-Assad to remain in power. Saudi Arabia is fuelling a proxy war as the chief financier of anti-Assad jihadist groups aimed at toppling the Syrian government and rolling back the influence of Hezbollah and Iran in the region, while Saudi officials have complained about US constraints placed on the kind of weapons allowed to be funneled to militia groups, arguing that the Obama administration’s reluctance to provide rebels with anti-aircraft missiles has allowed Syrian government forces to make significant gains on the battlefield.
US and Saudi delegations sit opposite as US President Barack Obama meets with King Abdullah at Rawdat al-Khraim (Desert Camp) near Riyadh in Saudi Arabia, March 28, 2014 (Reuters / Kevin Lamarque)
There are also significant differences between the two allies with respect to the Israel-Palestine conflict. Riyadh is disappointed with Washington’s unwillingness to pressure the Israelis into making tough concessions; Saudi Arabia and other members of the Arab League also reject Washington’s decision to back Israel’s demand to be recognized as a “Jewish state,” because doing so implies that Palestinians renounce their right of return. The House of Saud was deeply upset when the Obama administration turned away from Hosni Mubarak during Egypt’s first leadership transition in 2011, giving rise to the Qatar-backed Muslim Brotherhood. Riyadh enthusiastically supported the ouster of elected Islamist President Mohammed Morsi in favor of a Saudi-aligned military junta. Though Washington hasn’t broke away from the new regime in Cairo, leaders in Saudi Arabia volunteered to provide financial assistance to compensate for the suspension of a portion of US military aid, and the two allies have clear differences on the situation in Egypt. As a protest against perceived American inaction and the inability of the UN to effectively ‘punish’ the Syrian government for allegedly using chemical weapons, the leadership of Saudi Arabia famously rejected a seat on the UN Security Council. Though officials from the kingdom point to Riyadh’s rejection of the UN seat as an example of their preparedness to act independently, this gesture ultimately was a pressure tactic to coax the US into taking a harder line.
Going it alone?
Saudi Arabia’s ambassador to Britain published a striking column in the New York Times last year decrying western policies on Syria and Iran as a dangerous gamble, warning that the kingdom would not stand idly by. The op-ed essentially calls for military action against Damascus (and by extension, Tehran) and vows that the kingdom will become more assertive in international affairs. Saudi Arabia has expressed a desire to formulate a new assertive foreign policy doctrine to contest a resurgent Iran and its support bloc, hastened by a deteriorating relationship with Washington as imports of Saudi crude are at their lowest point in two decades in the wake of the US shale oil boom. However, there are few indications that Riyadh has channeled its rhetoric and gestures into a fundamental policy shift; in fact, the opposite may be taking place. The recent shuffling of key officials appears to be designed to ease tensions with the US, allowing both allies to more effectively coordinate in their drive to oust the Syrian government. There are also no indications that Saudi Arabia is defying the US by providing advanced weapons systems to rebel militias fighting in Syria. The Saudis have placed more emphasis on pushing against Assad using diplomatic means. Rather than taking a major policy shift away from the US, the sacking of Saudi intelligence chief Prince Bandar bin Sultan has arguably been an effort to please Washington.
US President Barack Obama meets with King Abdullah at Rawdat al-Khraim (Desert Camp) near Riyadh in Saudi Arabia, March 28, 2014 (Reuters / Kevin Lamarque)
Senior American officials were known to have described Prince Bandar as an erratic and hot-headed character, while US Secretary of State John Kerry complained about his conduct and labeled him as “the problem” when discussing the kingdom’s policy on Syria. Bandar was sacked from his role as the main coordinator of the Syrian dossier and replaced with Prince Mohammed bin Nayef, a personal friend of John Kerry and CIA Director John Brennan who analysts believe is capable of calming relations with Washington. Reports indicate that since the shuffle, the kingdom has pledged to make greater efforts to explore diplomatic avenues to pressure Russia, Iran and Hezbollah. A quieter and less extreme strategy for Syria has been evidenced by a recent decree that bars Saudi citizens from fighting in conflicts outside the kingdom, with a punishment of incarceration for offenders. The decree is sorely disingenuous when considering how Saudi authorities knowingly aided jihadist groups whose members included foreigners and Saudi citizens throughout Syria’s civil war. The policy shift has more to do with clamping down on extremist elements inside the kingdom that may potentially seek to rise up against the monarchy, but it also signals a willingness to appease Washington by flying the flag of so-called ‘moderation’ and taking a more cautious approach.
No break with Washington
There appears to be a spilt in the Saudi leadership between one side that calls for an independent posture, a hardline interventionist stance on Syria, and strategic shift away from the US. The other branch is more cautious and realizes that significant changes to the status quo may pose too much vulnerability to the kingdom. For the moment, King Abdullah has taken the cautious path, and Riyadh is also aware that the US security umbrella is the best bet for regime stability and continuity; the existing rift would have to deepen considerably before any major shift away from Washington can be considered. Though the Saudis have vowed to take a quieter approach on Syria, the significant gains of government forces in recent times have pushed Riyadh to call for equipping rebel forces with man-portable air-defense systems. Prince Mohammed, who has a history of leading counterterrorism operations in Yemen, has attempted to assuage American fears that any advanced weapons would not end up in the hands of extremists. The Obama administration is now mulling the decision whether or not to provide them. Even so, there is no indication that Riyadh plans to go ahead with deploying advanced weapons without Washington's green light, suggesting that the ‘major shift’ promised by some Saudi officials has been sidelined.
Obama’s recent trip to Saudi Arabia came as a response to tactical pressure placed on the administration by the House of Saud, which is not seriously intending to disengage with the US. Oil has always underlined the US-Saudi relationship, and as Gulf exporters turn their attention eastward toward energy hungry developing economies as the US capitalizes on the shale boom, there are slow-motion risk diversification efforts being made that will strengthen Saudi relations with a parallel web of allies. For now, the marriage of convenience looks set to remain in place.
Σάββατο 29 Μαρτίου 2014
Confirmed: Oldest Fragment of Early Earth is 4.4 Billion Years Old
Confirmed: Oldest Fragment of Early Earth is 4.4 Billion Years Old
By Becky Oskin, Staff Writer | February 23, 2014 01:02pm ET
Cathodoluminescence image of a 400-μm Jack Hills zircon. Credit: John Valley, University of Wisconsin |
Well, scientists just took one of geology's biggest controversies and shrunk it down to atomic size. By zapping single atoms of lead in a tiny zircon crystal from Australia, researchers have confirmed the crystal is theoldest rock fragment ever found on Earth — 4.375 billion years old, plus or minus 6 million years.
"We've proved that the chemical record inside these zircons is trustworthy," said John Valley, lead study author and a geochemist at the University of Wisconsin, Madison. The findings were published today (Feb. 23) in the journal Nature Geoscience.
Confirmation of the zircon age holds enormous implications for models of early Earth. Trace elements in the oldest zircons from Australia's Jack Hills range suggest they came from water-rich, granite-like rocks such as granodiorite or tonalite, other studies have reported. That means Earth cooled quickly enough for surface water and continental-type rocks just 100 million years after the moon impact, the massive collision that formed the Earth-moon system. [How Was The Moon Formed?]
"The zircons show us the earliest Earth was more like the Earth we know today," Valley said. "It wasn't an inhospitable place."
Dubious history
Zircons are one of the toughest minerals on the planet. The ancient Australian crystals date back to just 165 million years after Earth formed, and have survived tumbling trips down rivers, burial deep in the crust, heating, squeezing and a tectonic ride back to the surface. The Australian zircons, from the Jack Hills, aren't the oldest rocks on Earth — those are in Canada — but about 3 billion years ago, the minerals eroded out some of Earth's first continental crust and became part of a riverbed.
Geologists have carefully sorted out more than 100,000 microscopicJack Hills zircons that date back to Earth's early epochs, from 3 billion to nearly 4.4 billion years ago. (The planet is 4.54 billion years old.) The crystals contain microscopic inclusions, such as gas bubbles, that provide a unique window into conditions on Earth as life arose and the first continents formed.
Zircons hold minute amounts of two naturally occurring uranium isotopes — isotopes are atoms of the same element with different numbers of neutrons. Uranium radioactively decays to lead at a steady rate. Counting the number of lead isotopes is how scientists date the crystals. But as the uranium kicks out lead atoms, the radioactive decay releases alpha particles, which can damage the crystals, creating defects. These defects mean fluids and outside elements can infiltrate the crystals, casting doubt on any conclusions about early Earth based on the zircons.
More important, uranium and lead can move around within a crystal, or even escape or enter the zircon. This mobility can throw off the lead isotope count used to calculate the zircon ages, and is the source of the decades-long controversy over the Jack Hills zircons' Methuselah lifespan.
"If there's a process by where lead can move from one part of the crystal to another place, then the place where lead is concentrated will have an older apparent age and the place from where it moves will have a younger apparent age," Valley said.
Atom by atom
Valley and his co-authors hope to end the debate by showing that even though one of the oldest Jack Hills zircons suffered radiation damage, the lead atoms stayed in place. The researchers painstakingly counted individual lead atoms within the oldest-known zircon with a recently developed technique called atom-probe tomography. Inside the zircon, lead atoms clustered together in damage zones just a few nanometers wide. Imagine cliques of teens during high school lunch — like teenagers, no lead atoms had left their zones.
"We've demonstrated this zircon is a closed geochemical system, and we've never been able to do that before," Valley said. "There's no question that many zircons do suffer radiation damage, but I think relative to these zircons, this should settle it once and for all," Valley told Live Science's Our Amazing Planet.
"This careful piece of work should settle the debate because it shows that indeed there is some mobility of lead, which was hypothesized to result in dates that were too old, but the scale of mobility is nanometers," said Samuel Bowring, a geochemist at MIT, who was not involved in the study. "Even the smallest volumes analyzed with the ion probe average out the heterogeneities," or variations within the zircon.
The new atom-probe technique, while extremely laborious, can also be used to address questions of reliability at other sites where extremely old rocks have been found, the researchers said.
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