070722-N-8848T-030 GREAT LAKES, Ill. (July 22, 2007) - Country music recording artist Joe Diffie performs in front of Sailors and family members on Ross Field at Naval Station Great Lakes. The free concert, which also included country star Aaron Tippin, was part of the Spirit of America Tour sponsored by Morale, Welfare and Recreation. U.S. Navy photo by Scott A. Thornbloom (RELEASED)