Luis Castillo of the San Diego Chargers rides in the cockpit of a US Air Force C-17 aircraft on his way to Bagram Air Base in Afghanistan while on a week-long USO tour. During the trip, Castillo along with Tommie Harris (Chicago Bears), Michael Rucker (Carolina Panthers) and �Sports Illustrated� writer Peter King will meet and greet troops, sign autographs and extend their support to those in uniform. (Photo by Michael A. Clifton/USO)

Mike Rucker, Carolina Panthers and Luis Castillo, San Diego Chargers visit U. S. military personnel on March 3, 2008 at Manas Air Base, Bishkek, Khyrgzstan. (Photo by Michael A. Clifton/USO)

Luis Castillo, San Diego Chargers points out on the map how far he had to come to participate in the Khyrgzstan and Afghanistan NFL Tour. (Photo by Michael A. Clifton/USO)

Mike Rucker, Carolina Panthers (l) and Luis Castillo, San Diego Chargers listen as a U. S. Airman describes refueling procedures on the KC-135 at Manas Air Base, Bishkek, Khyrgzstan. (Photo by Michael A. Clifton/USO)

Luis Castillo, San Diego Chargers, Tommie Harris, Chicago Bears, Mike Rucker, Carolina Panthers and sports writer Peter King take time to pose with U. S. Air Force personnel at Manas Air Base, Bishkek, Khyrgzstan on March 3, 2008. (Photo by Michael A. Clifton/USO)

Mike Rucker, Carolina Panthers, Tommie Harris and Luis Castillo sign autographs for U. S. military personnel at Manas Air Base, Bishkek, Khyrgzstan on March 3, 2008. (Photo by Michael A. Clifton/USO)

Mike Rucker of the Carolina Panthers talks to U. S. military personnel at Manas Air Base in Bishkek, Khyrgzstan. (Photo by Michael A. Clifton/USO)

Tommie Harris (Chicago Bears), Michael Rucker (Carolina Panthers) and Luis Castillo (San Diego Chargers) take a moment to view military aircraft at Bagram Air Base and chat with those back home during a week-long USO tour. (Photo by Michael A. Clifton/USO)

Tommie Harris of the Chicago Bears takes a moment to goof off as he exits a US AH-64 helicopter at Bagram Air Base in Afghanistan while on a week-long USO tour. (Photo by Michael A. Clifton/USO)

�Sports Illustrated� writer Peter King checks out the cockpit of an AH-64 helicopter at Bagram Air Base in Afghanistan during a week-long USO tour. This is King�s first USO tour. (Photo by Michael A. Clifton/USO)

Mike Rucker of the Carolina Panthers shakes a soldier's hand after viewing the cockpit of a AH-64 Apache helicopter at Bagram Air Base in Afghanistan. This is Rucker�s first USO tour. (Photo by Michael A. Clifton/USO)

San Diego Chargers� defensive end Luis Castillo takes a ride in an AH-64 helicopter simulator during a week-long USO tour to Kyrgyzstan and Afghanistan. This is Castillo�s first USO tour. (Photo by Michael A. Clifton/USO)

NFL players Tommie Harris of the Chicago Bears, Mike Rucker of the Carolina Panthers and Luis Castillo of the San Diego Chargers along with �Sports Illustrated� writer Peter King pose with soldiers in front of an AH-64 helicopter while touring on a seven-day USO tour. During the visit, the group will meet and greet service members, sign autographs and share their experiences playing professional football. (Photo by Michael A. Clifton/USO)