The U.S. Air Force began Red Flag 17-3, its three-week air-to-air combat training exercise. Teh drill will conclude on July 28. Aircraft depart from Nellis Air Force Base, Nev., twice daily to participate in combat training missions on the Nevada Test and Training Range north of Las Vegas in one of the Air Force’s largest joint exercises. For the first time, two F-35 Lightning II squadrons take part in the drill as the Marine Corps’ F-35Bs participate alongside the Air Force’s F-35As. Red Flag consists of a variety of attack, fighter and bomber aircraft, reconnaissance aircraft, electronic warfare aircraft, airlift support, search and rescue aircraft, aerial refueling aircraft and ground based command and control, space and cyber forces. More than 2,500 joint warfighters will participate in the multi-domain integration, Red Flag 17-3, where they will operate together and successfully defeat the threat. Follow updates.