This is an approximate 1:24 scale model of the U.S. Air Force Thrust-Augmented Thor-Agena D rocket. The rocket was launched over 60 times from 1963-1968, primarily to place the highly-classified Corona photoreconnaissance satellites in orbit. It had a standard liquid-fuel Thor first stage, with three solid-fuel strap on boosters. The second stage was a liquid-fuel Agena D that carried the Corona cameras and film return capsules in its nose. This model was donated by the National Reconnaissance Office to NASM in 1996.
This object is on display in James S. McDonnell Space Hangar at the Steven F. Udvar-Hazy Center in Chantilly, VA.