Coast Guard crewmembers use sledge hammers to seal a rivet pin to a shackle during the heat-and-beat competition aboard the Coast Guard Cutter Hickory at the Buoy Tender Roundup Olympics in Juneau, Alaska, Aug. 16, 2017. Crews aboard Coast Guard buoy tenders in Alaska service 1,350 navigational aids along 33,000 miles of coastline while actively participating in search and rescue, environmental protection and law enforcement missions. U.S. Coast Guard photo by Petty Officer 1st Class Jon-Paul Rios.