Staff Sgt. David McCubbin, 14th Airlift Squadron loadmaster (left), and Capt. David Schunk, 14th AS pilot (right), meet with Alison Riske, professional tennis player April 5, 2016, on a C-17 Globemaster III at JB Charleston – Air Base, S.C. Riske is in Charleston competing in the Volvo Car Open tennis tournament and visited the Air Base to sign autographs for Team Charleston members and tour a C-17 Globemaster III. (U.S. Navy photo/Mass Communications Specialist 1st Class Sean Stafford)

2nd Lt. Richard Scherl, 437th Aircraft Maintenance Squadron, receives an autographed tennis ball from Alison Riske, professional tennis player, April 5, 2016, at the fitness center on Joint Base Charleston – Air Base, S.C. Riske is in Charleston competing in the Volvo Car Open tennis tournament and visited the Air Base to sign autographs for Team Charleston members and tour a C-17 Globemaster III. (U.S. Air Force photo/Senior Airman Clayton Cupit)

Alison Riske, professional tennis player, hands out autographed tennis balls to Joint Base Charleston members April 5, 2016, at the fitness center on JB Charleston – Air Base, S.C. Riske is in Charleston competing in the Volvo Car Open tennis tournament and visited the Air Base to sign autographs for Team Charleston members and tour a C-17 Globemaster III. (U.S. Air Force photo/Senior Airman Clayton Cupit)