Training participants with U.S. Coast Guard Air Station Sitka activate a smoke signal from an emergency inflatable raft in the waters near Sitka, Alaska, during a mass casualty exercise April 16, 2026. Training participants fired a variety of pyrotechnic distress signals for helicopter rescue teams to notice during a large joint exercise involving multiple government agencies and local organizations. (U.S. Coast Guard photo by Petty Officer 2nd Class John Hightower)