Who is the main character in the film "Unbroken" directed by Angelina Jolie?

Louis Silvie Zamperini (January 26, 1917 – July 2, 2014) was an American World War II veteran, a Christian evangelist and an Olympic distance runner, best known for being a Japanese prisoner of war survivor.

Zamperini took up running in high school and qualified for the US in the 5,000 m race for the 1936 Berlin Olympics. In 1941, he was commissioned into the United States Army Air Forces as a lieutenant. He served as a bombardier in B-24 Liberators in the Pacific. On a search and rescue mission, mechanical difficulties forced Zamperini's plane to crash in the ocean. After drifting at sea for 46–47 days (island spotted on the 46th, and arrived on 47th) he landed on the Japanese occupied Marshall Islands and was captured. He was taken to a prison camp in Japan where he was tortured. Following the war he initially struggled to overcome his ordeal.

Later he became a Christian Evangelist with a strong belief in forgiveness. Since 1952 he devoted himself to at-risk youth which his family continues today. Zamperini is the subject of three biographical films: Unbroken (2014), Captured by Grace (2015), and Unbroken: Path to Redemption (2018 sequel to Unbroken, 2014).