F-35 Lightning II refuels

A luke Air Force Base F-35 Lightning II accepts fuel from a KC -135 Stratotanker May 5, 2016, at 21 thousand feet above Arizona.

A luke Air Force Base F-35 Lightning II accepts fuel from a KC -135 Stratotanker May 5, 2016, at 21 thousand feet above Arizona.

LUKE AIR FORCE BASE, Arizona -- A Luke Air Force Base F-35 Lightning II accepts fuel from a KC -135 Stratotanker May 5, 2016, at 21 thousand feet above Arizona.