General John Raymond, Chief of Space Operations, U.S. Space Force, center, administers the oath of office to NASA astronaut Mike Hopkins, onboard the International Space Station, as he is transferred from the U.S. Air Force to the U.S. Space Force, Friday, Dec. 18, 2020, from the Space Operations Center at NASA Headquarters in Washington. Photo Credit: (NASA/Joel Kowsky), Friday, Dec. 18, 2020, from the Space Operations Center at NASA Headquarters in Washington. Photo Credit: (NASA/Joel Kowsky)