SAN FRANCISCO -- A team of FBI agents load an injured agent into an MH-65 Dolphin helicopter, from Air Station San Francisco, during a training exercise March 25, 2010. The Coast Guard helicopter crews supported three training exercises in which the FBI simulated the pursuit of fleeing suspects from a terrorist attack. Using its airborn use of force and electronic surveillance system capabilities, the helicopter crews provided aerial reconnaissance and tactical cover for the FBI assault teams in rural and urban settings. U.S. Coast Guard photo by Air Station San Francisco.