U.S. Air Force Staff Sgt. Marcos Sepulveda, 42nd Force Support Squadron, ALS Instructor, laughs with his students in the classroom, July 26 2021, on Columbus Air Force Base, Miss. Sepulveda welcomes his class back for the first time since the peak of the COVID pandemic in 2020. (U.S. Air Force photo by Second Lieutenant Peyton Craven)