Adam Well, South Dakota School of Mines and Technology student, demonstrates the cold spray repair process on an aircraft panel at the SDSMT in Rapid City, S.D., Jan. 31, 2013. Several million dollars have been invested into cold spray research and application during the past five years – an investment that could save the Department of Defense approximately $100 million if implemented DOD-wide. (U.S. Air Force photo by Airman Ashley J. Thum/Released)