Senior Airman Amy Kristoffersen, 374th Communications Squadron Operations Flight client systems technician journeyman, opens up the side of a printer prior to performing a printer swap at Yokota Air Base, Japan, April 4, 2018. The 374th CS OS handles installations, troubleshooting and replacement of computers, phones and other devices for all of Yokota. (U.S. Air Force photo by Airman 1st Class Matthew Gilmore)