Conversation so far:
What was Leonard Bernstein's involvement with social activism?
While Leonard Bernstein was very well known for his music compositions and conducting, he was also known for his outspoken political views and his strong desire to further social change.
What social issues was Leonard Bernstein involved with?
Leonard Bernstein and his wife held the event seeking to raise awareness and money for the defense of several members of the Black Panther Party

Question: What else happened?
Self-contained rewrite: What else happened after Leonard Bernstein held an event in defense of the Black Panther Party?