LAKE ST. CLAIR - Coast Guard Petty Officer 1st Class Brad Fitzpatrick (foreground) waits for Petty Officer 3rd Class Brendan Dent in a simulated rescue on the frozen Lake St. Clair during training conducted by Air Station Detroit, 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