A Dolphin helicopter crew from U.S. Coast Guard Air Station Traverse City, Mich., participates in the Twin Endeavor mass ice-rescue exercise in Brimley, Mich., March 5, 2016. The Coast Guard, along with 26 other agencies, participated in the Twin Endeavor plane crash exercise on Waiska Bay. (U.S. Coast Guard photo by Petty Officer 3rd Class Joel Altman)