TOP OFFICER With Deputy Defense Secretary William J. Lynn III to his left, Chairman of the Joint Chiefs of Staff U.S. Navy Adm. Mike Mullen is acknowledged before President Barack Obama signs the Don't Ask, Don't Tell Repeal Act of 2010 during a ceremony at the Interior Department in Washington, D.C., Dec. 22, 2010. SHARE: Download: Full Size (0.07 MB) Credit: VIRIN: 307645-V-HZI32-648.jpg Photo Gallery