A busy day on the flight line

A KC-10 Extender is seen in the foreground of a departing C-5M Super Galaxy July 11, 2019, at Travis Air Force Base, California. With roughly 3,300 aircraft continuously arriving and departing on a monthly basis, Travis handles more cargo and passenger traffic than any other military air terminal in the United States. (U.S. Air Force photo by Heide Couch)

The engine of a KC-10 Extender is seen in the foreground of a departing C-5M Super Galaxy July 11, 2019, at Travis Air Force Base, California. With roughly 3,300 aircraft continuously arriving and departing on a monthly basis, Travis handles more cargo and passenger traffic than any other military air terminal in the United States. (U.S. Air Force photo by Heide Couch)

An E-3 Sentry Airborne Warning and Control System aircraft departs July 11, 2019, at Travis Air Force Base, California. The aircraft is equipped with a 30-foot-wide radar subsystem that permits surveillance up to the Earth's stratosphere and is assigned to Tinker Air Force Base, Oklahoma. (U.S. Air Force photo by Heide Couch)

An E-3 Sentry Airborne Warning and Control System aircraft departs July 11, 2019, at Travis Air Force Base, California. The aircraft is equipped with a 30-foot-wide radar subsystem that permits surveillance up to the Earth's stratosphere and is assigned to Tinker Air Force Base, Oklahoma. (U.S. Air Force photo by Heide Couch)

An E-3 Sentry Airborne Warning and Control System aircraft departs July 11, 2019, at Travis Air Force Base, California. The aircraft is equipped with a 30-foot-wide radar subsystem that permits surveillance up to the Earth's stratosphere and is assigned to Tinker Air Force Base, Oklahoma. (U.S. Air Force photo by Heide Couch)

U.S. Air Force KC-10 Extender tanker aircraft based at Travis Air Force Base, California, July 11, 2019. Although the KC-l0’s primary mission is aerial refueling, it can combine the tasks of a tanker and cargo aircraft by refueling fighters while simultaneously carrying support personnel and equipment. (U.S. Air Force photo by Heide Couch)

U.S. Air Force KC-10 Extender rests on the flight line July 11, 2019 at Travis Air Force Base, California. Although the KC-l0’s primary mission is aerial refueling, it can combine the tasks of a tanker and cargo aircraft by refueling fighters while simultaneously carrying support personnel and equipment. (U.S. Air Force photo by Heide Couch)

A KC-10 Extender landing strut is serviced by ground maintenance, July 11, 2019, at Travis Air Force Base, California. Although the KC-l0’s primary mission is aerial refueling, it can combine the tasks of a tanker and cargo aircraft by refueling fighters while simultaneously carrying support personnel and equipment.(U.S. Air Force photo by Heide Couch)

U.S. Air Force KC-10 Extender rests on the flight line July 11, 2019 at Travis Air Force Base, California. Although the KC-l0’s primary mission is aerial refueling, it can combine the tasks of a tanker and cargo aircraft by refueling fighters while simultaneously carrying support personnel and equipment. (U.S. Air Force photo by Heide Couch)

U.S. Air Force KC-10 Extender rests on the flight line July 11, 2019 at Travis Air Force Base, California. Although the KC-l0’s primary mission is aerial refueling, it can combine the tasks of a tanker and cargo aircraft by refueling fighters while simultaneously carrying support personnel and equipment. (U.S. Air Force photo by Heide Couch)

The tail of a KC-10 Extender is seen in the foreground of a departing C-5M Super Galaxy July 11, 2019, at Travis Air Force Base, California. With roughly 3,300 aircraft continuously arriving and departing on a monthly basis, Travis AFB handles more cargo and passenger traffic than any other military air terminal in the United States. (U.S. Air Force photo by Heide Couch)

The tail of a KC-10 Extender is seen in the foreground of a departing C-5M Super Galaxy July 11, 2019, at Travis Air Force Base, California. With roughly 3,300 aircraft continuously arriving and departing on a monthly basis, Travis AFB handles more cargo and passenger traffic than any other military air terminal in the United States. (U.S. Air Force photo by Heide Couch)