FILE PHOTO: Workers prepare an MQ-1C Gray Eagle unmanned aerial vehicle for static display at Michael Army Airfield, Dugway Proving Ground in Utah in this September 15, 2011 US Army handout photo obtained by Reuters February 6, 2013. REUTERS/U.S. Army/Spc. Latoya Wiggins/Handout (UNITED STATES – Tags: MILITARY POLITICS) THIS IMAGE HAS BEEN SUPPLIED BY A THIRD PARTY. IT IS DISTRIBUTED, EXACTLY AS RECEIVED BY REUTERS, AS A SERVICE TO CLIENTS. FOR EDITORIAL USE ONLY. NOT FOR SALE FOR MARKETING OR ADVERTISING CAMPAIGNS/File Photo