ELLSWORTH AIR FORCE BASE, S.D. -- Airman 1st Class Matthew Hung, 28th Civil Engineer Squadron emergency management journeyman, puts on a chemical protection suit while Airman Francheska Rebardi, 28th CES emergency management apprentice, assists him during a joint training mission with the Army National Guard and the Rapid City Fire Department in Rapid City, S.D., Nov. 4. Ellsworth Airmen utilize this training scenario to improve their skills not only with their job but also improve their skills working with other agencies. (U.S. Air Force photo/Senior Airman Anthony Sanchelli)