Sister city tour
ELLSWORTH AIR FORCE BASE, S.D. -- Tech. Sgt. David Ross, 28th Civil Engineer Squadron crew chief, displays firefighting equipment and vehicles to high school students from Nikko City, Japan here, July 30. The students are involved with a nonprofit diplomacy network that creates and strengthens partnerships between the United States and international communities. (US Air Force Photo/Airman 1st Class Adam Grant)