Conversation so far:
Was Ira Hayes one of the people who raised the flag on Iwo Jima?
Ira Hayes was one of the six flag raisers immortalized in the iconic photograph of the second flag raising on Iwo Jima during World War II.

Question: How many people were involved with that?
Self-contained rewrite: How many people were involved with the raising of the flag in Iwo Jima?