ISIS continues its advance in Iraq, attacking an air base housing hundreds of U.S. troops. CNN's Phil Black reports.<script type='text/javascript' src='http://i.cdn.turner.com/cnn/van/resources/scripts/van-widgets.js'></script> <div data-cnnvansinglewidget data-affiliate='gantdaily' data-videoid='world/2015/02/14/lklv-black-iraq-isis-attacks.cnn' data-size='auto' data-autostart='true'></div>