CHAIRMAN VISIT U.S. Navy Adm. Mike Mullen, chairman of the Joint Chiefs of Staff, addresses troops at an all-hands call on Forward Operating Base Marez in Mosul, Iraq, Aug. 1, 2011. Mullen is on a five-day USO tour with comedian Jon Stewart, NBA Legend Karl Malone and magician David Blaine visiting troops in Afghanistan and Iraq. SHARE IMAGE: Download Image: Full Size (0.08 MB) Photo By: VIRIN: 899056-C-RSF35-807.jpg Photo Gallery