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Syrian Opposition Coalition President Ahmad Jarba speaks during a press conference during the 'Friends of Syria' meeting on May 15, 2014 in London, England. (Matt Dunham - WPA Pool/Getty Images)

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Members of the Vostok Battalion, a pro-Russia militia, stand guard in an intersection on May 20, 2014 in Donetsk, Ukraine. (Brendan Hoffman/Getty Images)

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A scientist holds a flask containing the chemical Bisphenol-A, on October 9, 2012 at the French national institute for Agronomical research in Toulouse.(REMY GABALDA/AFP/GettyImages)

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A Chinese coast guard vessel (L) followed by a Vietnamese coast guard ship (R) near the area of China's oil drilling rig in disputed waters in the South China Sea, May 14, 2014. (HOANG DINH NAM/AFP/Getty Images)

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Viagra drugs made by Pfizer and Nexiam made by the pharmaceutical firm AstraZeneca are displayed in a Pharmacy on May 15, 2014 in Johannesburg, South Africa. (Christopher Furlong/Getty Images)

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Clerics sit next to a screen showing Dutch priest Frans van der Lugt during a remembrance ceremony for the dead priest in the Sint Nicolaasbasiliek in Amsterdam, on April 11, 2014. (REMKO DE WAAL/AFP/Getty Images)