Control Configured Vehicle,
    General Dynamics YF-16
Convair Pogo
Cornelius, George
Craigie, Laurence "Bill"
    talks of flying XP-59
    decides F-86 wing sweep	
Curtiss X-19A

DARPA (see ARPA)
da Vinci, Leonardo
    develops retractable
        landing gear
    tries vertical flight
Dayton, Ohio
DC-3, Douglas
D-Day
de Bellevue, Charles
    with Ritchie
    as backseater
de Havilland Mosquito