sentences:  During one trip to Los Alamos he met Subrahmanyan Chandrasekhar, whom he worked with again almost ten years later.In the 1950s Colgate was in charge of thousands during the Bravo test, the first deliverable thermonuclear bomb, which akin to his earlier work, included the atmospheric sampling Project Ashcan.Upon the success of the detonation, Teller encouraged Colgate to begin research on thermonuclear fusion and plasma physics.