PHILIDELPHIA (March 2, 2021) U.S. Secretary of Homeland Security Alejandro N. Mayorkas answers questions at a press conference during the soft launch of the state-run, federally-supported Center City Community Vaccination Center at the Pennsylvania Convention Center in Philadelphia on March 2, 2021. Marines and Sailors with CLB-22 from Camp Lejeune, North Carolina, are deployed in support of the Department of Defense federal vaccine response operations. U.S. Northern Command, through U.S. Army North, remains committed to providing continued, flexible Department of Defense support to the Federal Emergency Management Agency as part of the whole-of-government response to COVID-19. (U.S. Marine Corps photo by 1st Lt. Kevin Stapleton)