There are now 2,500 civilians working under Department of Defense contract in Afghanistan, compared to 4,000 uniformed service members, according to a report by the non-partisan Congressional Research Service. Most are U.S. citizens. Last March, CRS statistics actually showed that contractors outnumbered military personnel in the country – with 28,600, as compared to 8,700 troops. The contractors perform transportation, construction, base support, intelligence analysis, translation, and private-security tasks, according to a related article published on the Association of the U.S. Army web site. Contractors in Iraq and Afghanistan cost $220 billion between Oct. 1, 2014, and Sept. 30, 2015, according to the CRS.