Operations conducted in the cities of Yuma, El Centro and Brawley, Calif., are part of the Corps' twice-yearly Weapons and Tactics Instructors (WTI) training course.
Helicopters will take to the skies and Marines will train in parks around Yuma and Brawley the during biannual Weapons and Tactics Instructors (WTI) course. Video by James Gilbert/Sun File Footage