Anderson Cooper 360

Tonight on AC360: Transgender former Navy SEAL speaks out

Christopher Beck served as a U.S. Navy SEAL in some of the most dangerous battlegrounds in the world, including Iraq and Afghanistan. During his time in the elite unite, he earned the Bronze Star, the Purple Heart and other medals and commendations.

But for 20 years while Beck was fighting for his country, he was also fighting an inner battle over his identity. He wanted to live his life as a woman.

After retiring in 2011, Beck did just that. Chris Beck is now Kristin Beck.

Beck's journey has not been easy. She had no role models to show her the way. She worried she wouldn't be accepted after she began dressing and living like a woman.

Hoping to help others, Beck has written a book about her experience and struggles.

In a revealing exclusive interview, she tells Anderson Cooper what it was like to transition from being a masculine Navy SEAL to a feminine woman. She also talks about conquering her fears, being true to herself and much more.

Tune in tonight at 8 and 10 p.m. ET for the fascinating interview.