Secretary Gates and U.S. Ambassador to Colombia William R. Brownfield depart the Colombian Ministry of Defense. Secretary of Defense Robert M. Gates and U.S. Ambassador to Colombia William R. Brownfield depart the Colombian Ministry of Defense after discussions with senior Colombian defense officials in Bogota, Colombia, on April 15, 2010. SHARE IMAGE: Download Image: Full Size (0.08 MB) Photo By: VIRIN: 434773-M-LQQ79-631.jpg Photo Gallery