Original:  Martlet 4 By July 1964, the Marlet 4 program pursued the development of an orbit capable multi-stage rocket system to be launched from the 16" Barbados gun.
Revised:  Martlet 4 By July 1964, the Marlet 4 program pursued developing an orbit capable multi-stage rocket system to be launched from the 16" Barbados gun.
Edit intent: style