A member of Navy SEAL Team 3 describes his life as a father and husband, and as the serviceman with the most confirmed sniper kills in the history of the United States military while serving in Iraq and Afghanistan.

"When Billy Summers was twelve years old, He shot and killed his mother's boyfriend after he kicked Billy's sister to death. At 17, he enlisted in the army. At 18, he was a sniper in Iraq and involved in the deadly battle to recapture Fallujah. For nearly twenty years, he's worked as a paid assassin. He's a good guy in a bad job, and he wants out. He takes on a very complicated, very lucrative job that he hopes will be his last. He's got a perfect...