LAKE ST. CLAIR - Petty Officer 2nd Class Jim Downey and Petty Officer 3rd Class Nicholas McConnell, both aviation survival technicians at Coast Guard Air Station Detroit conduct a training rescue hoist over frozen Lake St. Clair, Wednesday, Feb. 9, 2011. Conducting rescue airlifts on frozen surfaces presents unique challenges and the Coast Guard regularly practices their techniques to maintain proficiency. U.S. Coast Guard photo by Lt. Mark Dukti, Air Station Detroit