18 MXG Nest Program Battle of Okinawa Tour
U.S. Airmen from the 18th Maintenance Group tour the tunnel complex of the Japanese Naval Underground in Tomigusuku, Japan, March 26, 2021. This tunnel complex was dug by 3,000 men of the Yamane Division of the Japanese Navy Engineering Corps in 1944 as an underground headquarters. (U.S. Air Force photo by Airman 1st Class Yosselin Perla)