Maj. James Vallario, an AV-8B Harrier pilot with Marine Aircraft Group 13, bottom, and Maj. John Grunke, an AV-8B Harrier pilot with Marine Aviation Weapons and Tactics Squadron 1, top, train in their aircraft during the spring Weapons and Tactics Instructors' Course hosted by MAWTS-1 at Marine Corps Air Station Yuma, Ariz., March 30. WTI is hosted twice a year, once in the spring and once in the fall.

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Maj. James Vallario, an AV-8B Harrier pilot with Marine Aircraft Group 13, bottom, and Maj. John Grunke, an AV-8B Harrier pilot with Marine Aviation Weapons and Tactics Squadron 1, top, train in their aircraft during the spring Weapons and Tactics Instructors' Course hosted by MAWTS-1 at Marine Corps Air Station Yuma, Ariz., March 30. WTI is hosted twice a year, once in the spring and once in the fall.

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Photo credit: © Z2A Collection / Alamy / Afripics
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Keywords: 1, av-8b, aviation, bill, cpl., harrier, instructors, marine, mawts-1, mcas, squadron, tactics, waterstreet, weapons, wti, yuma