U.S. troops sent to Iraq Updated: Wednesday, August 13, 2014 IRAQ (NEWSCHANNEL 3) - More U.S. troops have been sent to Iraq, but the Department of Defense insists these are not "boots on the ground." At least 130 U.S. troops arrived in Iraq Tuesday. The Pentagon calls them advisors on a temporary mission.They will assess the humanitarian crisis facing tens of thousands of religious minorities trapped on a mountaintop by Islamic militants in northwestern Iraq."Very specifically this is not a combat boots on the ground operation. We're not going to have that kind of operation," said U.S. Secretary of Defense Chuck Hagel. The U.S. and the U.K. have been dropping food and water for the refugees, who are in danger of starving.They fled their homes after Isis militants threatened to kill any who refused to convert to Islam.The Pentagon says the newly arrived troops also will evaluate how successful the U.S. airstrikes have been in protecting the refugees.