Who is Rene Gagnon from Flags of Our Fathers and what is their importance?

Rene Gagnon was born in Manchester, New Hampshire, of French-Canadian parents. After receiving his draft notice, seventeen-year-old Rene joined the Marines because he liked their uniform. Rene was one of the six flag raisers on Iwo Jima. He was one of the three flag raisers who lived and returned home after the war.