Secretary Gates and U.S. Ambassador to Colombia William R. Brownfield walk through an honor cordon. Secretary of Defense Robert M. Gates and U.S. Ambassador to Colombia William R. Brownfield walk through an honor cordon after Gates arrived in Bogota, Colombia, on April 14, 2010. SHARE IMAGE: Download Image: Full Size (0.06 MB) Photo By: VIRIN: 245237-O-THG52-156.jpg Photo Gallery