A U.S. Marine Corps AH-1Z Viper helicopter participates in a close air support training exercise in Yuma, Ariz., April 10, 2014, during Weapons and Tactics Instructor Course 2-14. The Weapons and Tactics Instructor Course, hosted by Marine Aviation Weapons and Tactics Squadron (MAWTS) 1, is designed to teach the six functions of Marine Corps aviation while providing the closest experience to real combat strategy, tactics and execution.