Marine Corps Commandant Gen. James Amos testifies on Capitol Hill in Washington DC on Friday, Dec. 3, 2010, before the Senate Armed Service Committee. The chiefs of the Army, Marines and Air Force warned that implementing a repeal of the policy banning gays from serving openly in the military would be more difficult than a Pentagon study has suggested, challenging the assessments of other top military officials in the administration. (Photo by Jeff Malet)