Conversation so far:
What is the Manhattan Project?
atomic bomb project.
When did this project begin?
In February 1944.
Did he work on this with other people?
Rotblat joined the Los Alamos Laboratory as part of Chadwick's British Mission to the Manhattan Project.
What kind of things did they do on this project?
investigating whether high-energy gamma rays produced by nuclear fission would interfere with the nuclear chain reaction process.
Are there any other interesting aspects about this article?
By the end of 1944 it was also apparent that Germany had abandoned the development of its own bomb and Rotblat asked to leave the project.
What did he do after he left?
Rotblat was accused of being a Soviet spy.
Was he convicted and sent to prison?
Rotblat was able to show that much of the information within the dossier had been fabricated.
Was he involved in any other controversies during this project?
Rotblat recounted how a box containing "all my documents" went missing on a train ride from Washington D.C.
to New York as he was leaving the country.

Question: What was the end result of the project?
Self-contained rewrite: What was the end result of the Manhattan Project?