Navy Adm. Mike Mullen, chairman of the Joint Chiefs of Staff, administers the oath of re-enlistment to Spc. Dustin Katsilas of Centerville, Utah, Spc. Michael Winchester of Dallas, Sgt. Keith Fay of Malvern, Iowa, and Sgt. Brandon Purdeu of Rothchild, Wis., March 1. Mullen visited Combat Outpost 838 and Airplane Road in the Doura neighborhood of the Iraqi capital.