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U.S. troops stand guard at the site of a suicide car bomb attack in Kabul

U.S. troops stand guard at the site of a suicide car bomb attack in Kabul, February 10, 2014. A suicide bomber in a car targeted a convoy of vehicles carrying foreign forces in the eastern part of Afghan capital, Kabul on Monday. REUTERS/Omar Sobhani (AFGHANISTAN - Tags: CIVIL UNREST MILITARY)

Bomb kills American contractors in Kabul

A car bomb in the Afghan capital Kabul killed two United States contractors for the international security force ISAF on Monday, Feb. 10, 2014, the NATO-led force and a U.S. official said.

The explosion in eastern Kabul was the latest incident to rattle the city ahead of April's presidential election due to choose the country's first new leader since 2001.

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