Conversation so far:
When did Jimmy Doolittle first get involved with the space program?
Doolittle became acquainted with the field of space science in its infancy.
What drove Jimmy Doolittle's interest in the space program?
He wrote in his autobiography, I became interested in rocket development in the 1930s when I met Robert H. Goddard.

Question: Did he contribute anything to the program during this time?
Self-contained rewrite: Did Jimmy Doolittle contribute anything to the space program during the time after meeting Robert H Goddard?