U.S. Air Force medical providers receive a brief on how to utilize their Joint All-Domain Command and Control devices at the David Grant U.S. Air Force Medical Center, Travis Air Force Base, Fairfield, Calif., Dec. 27, 2020. Department of Defense medical teams prepare to integrate into California hospitals to provide medical support alongside hospital medical personnel in response to the COVID-19 pandemic. U.S. Northern Command, through U.S. Army North, remains committed to providing flexible U.S. Department of Defense support to the whole-of-America COVID-19 response. (U.S. Army photo by Spc. DeAndre Pierce)