Sgt. Kevin Luu (left), a gunner from Tioga, N.Y., and

Sgt. Kevin Luu (left), a gunner from Tioga, N.Y., and Spc. Benjamin D. Whiteman, a loader from Townsend, Del., work on a weapon atop a tank, May 12, during the grueling, weeklong 2014 Sullivan Cup Best Tank Crew Competition. Luu and Whiteman were part of the four-man team from Company C, 2nd Battalion, 3rd Armored Brigade Combat Team, 3rd Infantry Division, who won this year's Sullivan Cup Best Tank Crew.