PAKISTAN GREETING U.S. Army Lt. Col. John H. Knightstep, left, and Command Sgt. Maj. Scott Baily greet U.S. Navy Adm. Mike Mullen, chairman of the Joint Chiefs of Staff, on Chaklala Air Base in Islamabad, Pakistan, Dec.15, 2010. The aviation unit is returning to Alaska after completing a five-month tour to support the humanitarian relief effort in flood-stricken Pakistan. Knightstep is the commanding officer of the 1st Battalion, 52nd Aviation Regiment. SHARE IMAGE: Download Image: Full Size (0.07 MB) Photo By: VIRIN: 101356-N-NMQ06-554.jpg Photo Gallery