Petty Officer 2nd Class Bill Glenn, an electronics technician, assists Chief Petty Officer Michael Perrault, a machinery technician, removing dive gear aboard the Coast Guard Cutter Polar Star after diving under the ice in the Ross Sea, Jan. 30, 2015. Glenn and Perrault are members of the military dive team assigned to Polar Star in support of Operation Deep Freeze 2015. (U.S. Coast Guard photo by Petty Officer 1st Class George Degener)