Player Embed Code: Download Embed Share Sumo Crewmasters from MCAS Iwakuni Travel the World III MEF April 8, 2015 | 1:49 The primary mission of the KC-130 J is fixed and rotary wing aerial refueling; however, this massive aircraft wouldn’t even be able to fly without the upkeep from its caretakers, the crewmasters. Sgt Anthony Rayis hitched a ride to bring you the story. Video contains interviews with Marines from North Tonawanda, N.Y., and Hollidaysburg, Penn.