Calling Cadence U.S. Marine Master Gunnery Sgt. Lawrence Czubinski counts the cadence for the Combined Joint Task Force-Horn of Africa's Joint Operations Directorate physical training formation as they do push-ups at Camp Lemonier, Djibouti, Oct. 13, 2005. SHARE: Download: Full Size (0.1 MB) Credit: VIRIN: 954082-L-MFD96-326.jpg Photo Gallery