Petty Officer 2nd Class Keith Closson, a diver at Coast Guard Regional Dive Locker East, tends a line as two other divers are lowered into the water from the Coast Guard Cutter Polar Star at the National Science Foundation’s McMurdo Station, Antarctica, Jan. 19, 2016. Operation Deep Freeze 2016 was the first deployment with divers from all three Coast Guard dive lockers: East, West and Pacific. (U.S. Coast Guard photo by Petty Officer 2nd Class Grant DeVuyst)