Fred and Al Key of Mississippi break flight endurance record

Title card: "How Long Is Up?" / shot from another airplane of Fred and Al Key's airplane flying, Fred outside cockpit on catwalk / pilots' wives sitting in chairs writing on pieces of paper, children standing next to them / children running to pilot of refueling plane handing him letters for their fathers / refueling plane taxis across field / shot from airplane of refueling plane dropping refueling hose through air to Fred and Al's airplane / closer view of Fred and Al's plane being refueled / another shot of two planes breaking away / shot of Fred and Al��s plane after being refueled / Note: exact day not known