Josh Collins, 402nd Commodities Maintenance Group, aircraft structural mechanic explains to 2nd Lt. Emily Fogel, 366th Maitencance Group, the process of installing a spar repair piece on an F-15E Strike Eagle Oct 4, 2019, at Mountain Home Air Force Base, Idaho. The repair was done in order to preserve the mission readiness of the aircraft. (U.S. Air Force photo by Senior Airman Tyrell Hall)