(WUSA9)--- USO honored hundreds of military and their families with a summer grill-off contest at Nationals Park to celebrate the upcoming Fourth of July. Winner: U.S. Marine "Grill Sergeant" Lance Cpl. Noah Bratcher and his wife Cassandra. Lowe’s donated $100,000 to the USO on its behalf. Celebrity judges Brooklyn Decker and Carson Daly cheered on the chefs from all six branches of the military, Saturday, June 29, 2013.