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"U.S. warplanes bombed Islamist fighters marching on Iraq's Kurdish capital on Friday after President Barack Obama said Washington must act to prevent \"genocide\".               Islamic State fighters, who have beheaded and crucified captives in their drive to eradicate unbelievers, have advanced to within a half hour's drive of Arbil, capital of Iraq's Kurdish region and a hub for U.S. oil companies.               They have also seized control of Iraq's biggest dam, Kurdish authorities confirmed on Friday, which could allow them to flood cities and cut off vital water and electricity supplies.               A Pentagon spokesman said two F/A-18 aircraft from an aircraft carrier in the Gulf had dropped laser-guided 500-pound bombs on a mobile artillery piece used by the fighters to shell Kurdish forces defending Arbil.               Obama authorised the first U.S. air strikes on Iraq since he pulled all troops out in 2011, arguing action was needed to halt the Islamist advance, protect Americans and safeguard hundreds of thousands of Christians and members of other religious minorities who have fled for their lives."^^<http://www.w3.org/2001/XMLSchema#string>
<http://www.reuters.com/video/2014/08/08/first-video-of-us-air-strike-aftermath-i?videoId=337752925&videoChannel=2602&channelName=Most+Popular>