Secretary Gates is greeted by U.S. Ambassador to Colombia William R. Brownfield. Secretary of Defense Robert M. Gates is greeted by U.S. Ambassador to Colombia William R. Brownfield after his arrival in Bogota, Colombia, on April 14, 2010. SHARE IMAGE: Download Image: Full Size (0.06 MB) Photo By: VIRIN: 906750-N-BCK60-263.jpg Photo Gallery