BAGHDAD ARRIVAL U.S. Army Lt. Gen. Frank Helmick, center, and U.S. Air Force Brig. Gen. Anthony J. Rock, right, welcome U.S. Navy Adm. Mike Mullen, chairman of the Joint Chiefs of Staff, to Baghdad International Airport, April 21, 2011. Mullen is visiting the Central Command area of operations. elmick is deputy commanding general for Operations, U.S. Forces Iraq, and Rock is director, Iraq Training and Advisory Mission - Air Force, U.S. Forcs Iraq. SHARE: Download: Full Size (0.06 MB) Credit: VIRIN: 831829-K-VGR44-866.jpg Photo Gallery