killing and wounding u.s. troops and civilians. people suddenly thrown to the ground. devastation where u.s. troops have been on what the u.s. military called a routine patrol. cnn has learned from u.s. officials the troops have a civilian intelligence expert with them hoping to collect information about security and adversaries in the area. two u.s. troops along with that civili civilian intelligence expert were killed and three service members were wounded. acting defense secretary offering condolences. >> allow me to extend on behalf of the department of defense our thoughts and prayers to the families and team members of those killed and wounded during today's attack. >> republican senator lindsay