Clean Keyboard An employee at Hanscom Air Force Base, Mass., disinfects a keyboard at the end of the duty day, Nov. 5, 2020, as a preventive measure against the spread of COVID-19. SHARE: Download: Full Size (1.57 MB) Tags: air force, health, coronavirus Credit: Mark Herlihy, Air Force VIRIN: 201105-F-JW594-2001Y.JPG Photo Gallery