TRAINING CONCENTRATION U.S. Navy Petty Officer 2nd Class Roger Byassee provides security during training with the visit, board, search and seizure team assigned to the guided-missile cruiser USS Chosin in the Gulf of Aden, Nov. 29, 2009. The Chosin is the flagship of Combined Joint Task Force 151, a multinational task force established to conduct counter-piracy operations under a mission-based mandate to actively deter, disrupt, and suppress piracy off the coast of Somalia. SHARE: Download: Full Size (0.06 MB) Credit: VIRIN: 601435-H-LIA97-479.jpg Photo Gallery