Colombian Minister of Defense Silva, Secretary Gates and U.S. Ambassador to Colombia William R. Brownfield talk at the Presidential Palace. Colombian Minister of Defense Silva, Secretary of Defense Robert M. Gates (2nd from left) and U.S. Ambassador to Colombia William R. Brownfield talk at the Presidential Palace prior to meeting with President Alvaro in Bogota, Colombia, on April 15, 2010. SHARE: Download: Full Size (0.08 MB) Credit: VIRIN: 585941-L-BMJ18-752.jpg Photo Gallery