Toby Keith performs for more than 1,000 service members on Bagram Air Field, April 29. Keith is on his 10th USO/Armed Forces Entertainment tour. "I've met so many great, brave service men and women over the years and had so many wonderful experiences I can barely remember them all," said Keith in a press release. "One thing is for sure, I enjoy working with the USO, I love our nation's troops, and I won't ever stop doing my part to extend my thanks."