MARINE CORPS BASE CAMP PENDLETON, Calif. - Marines with Medium Helicopter Training Squadron 64 prepare to receive graduation honors as part of an HMMT 64 graduation ceremony here, Feb. 20. The eight Marines made history and became the last trainees to graduate with the CH-46 Sea Knight and will transition from using the CH-46 to the MV-22 Osprey. The Marine Corps has utilized the CH-46 Sea Knight since 1964.( Marine Corps photo by Lance Cpl Demetrius Morgan/released) - MARINE CORPS BASE CAMP PENDLETON, Calif. - Marines with Medium Helicopter Training Squadron 64 prepare to receive graduation honors as part of an HMMT 64 graduation ceremony here, Feb. 20. The eight Marines made history and became the last trainees to graduate with the CH-46 Sea Knight and will transition from using the CH-46 to the MV-22 Osprey. The Marine Corps has utilized the CH-46 Sea Knight since 1964.( Marine Corps photo by Lance Cpl Demetrius Morgan/released)