Two AH-1Z Viper pilots with Marine Light Attack Helicopter Squadron (HMLA) 169 participate in a simulation of exercise Sea Horse Wind aboard Marine Corps Air Station Camp Pendleton, Calif., Dec. 1. Exercise Sea Horse Wind was a long-range raid conducted by more than 600 Marines with 1st Marine Division and 29 aircraft with 3rd Marine Aircraft Wing. (U.S. Marine Corps photo by Lance Cpl. Jake M.T. McClung/Released) - Two AH-1Z Viper pilots with Marine Light Attack Helicopter Squadron (HMLA) 169 participate in a simulation of exercise Sea Horse Wind aboard Marine Corps Air Station Camp Pendleton, Calif., Dec. 1. Exercise Sea Horse Wind was a long-range raid conducted by more than 600 Marines with 1st Marine Division and 29 aircraft with 3rd Marine Aircraft Wing. (U.S. Marine Corps photo by Lance Cpl. Jake M.T. McClung/Released)

A three barreled M197 20- mm Gatling gun rests in front of a AH-1Z "Viper", the latest gunship to join the Marine Corps. The new Cobra can hold more than 700 rounds and fire them at a rate of approximately 730 per minute. The new Cobra can also carry twice the number of Hellfire missiles compared to the AH-1W ?Super Cobra.? (U.S. Marine Corps photo by Lance Cpl. Christopher O'Quin) (Released) - A three barreled M197 20- mm Gatling gun rests in front of a AH-1Z "Viper", the latest gunship to join the Marine Corps. The new Cobra can hold more than 700 rounds and fire them at a rate of approximately 730 per minute. The new Cobra can also carry twice the number of Hellfire missiles compared to the AH-1W ?Super Cobra.? (U.S. Marine Corps photo by Lance Cpl. Christopher O'Quin) (Released)