Mark Hengst, a maintenance worker for Youghiogheny River Lake in Confluence, Pennsylvania, attaches a kill switch cord to his foot during the Motorboat Operator Training Course hosted by the U.S. Army Corps of Engineers Pittsburgh District at Crooked Creek Lake in Ford City, Pennsylvania, Aug. 3, 2021. The 24-hour course included training on watercraft safety, a swim test, inflatable life jacket certification, boat launching, obstacle courses and a written exam. (U.S. Army Corps of Engineers Pittsburgh District photo by Michel Sauret)