Conversation so far:
How was Bob Graham as a U.S. Senator?
Bob Graham was then elected to the U.S. Senate in 1986, defeating incumbent Sen. Paula Hawkins.
Was there any controversy involving Bob Graham as a U.S Senator?
Bob Graham continued to oppose the Iraq War.
What happened during Bob Graham's time as a U.S. Senator?
Bob Graham led the joint congressional investigation into 9/11.
Was Bob Graham very popular or well liked by many?
Bob Graham was considered one of the most popular politicians in Florida.
Did Bob Graham make any changes?
No.

Question: What other things happened while he was U.S Senator?
Self-contained rewrite: What other things happened while Bob Graham was U.S Senator?