SAN DIEGO - Petty Officer 2nd Class John Coreano, from Air Station San Diego, inspects the rotor blade system on an MH-60 Jayhawk helicopter, Thursday, Oct. 20, 2011. Aircrews do a full preflight inspection prior to every flight to ensure the helicopter is in proper working order. U.S. Coast Guard photo by Petty Officer 2nd Class Levi Read.