当“美军的狙击手一直呆在某个地方暗算对方”，保护海军陆战队的时候，他们是在清理一个可能有对手的小区。他们是跟着部队走的。

Christopher Scott "Chris" Kyle (April 8, 1974 – February 2, 2013) was a United States Navy SEAL, and proclaimed most lethal sniper in U.S. military history, having accumulated 160 confirmed kills out of 255 probable kills. These numbers are based on individual shooter logs, filled out at the end of a mission, and reported to higher command. Confirmed kills must have a witness.

Kyle served four tours in the Iraq War and was awarded several commendations for acts of heroism and meritorious service in combat. He received two Silver Star Medals, five Bronze Star Medals, one Navy and Marine Corps Commendation Medal, and two Navy and Marine Corps Achievement Medals. Iraqi insurgents dubbed him the "Devil of Ramadi" and placed a series of ever increasing bounties on his head, purported to have eventually reached the low six figures. He became known by the moniker "Legend" among the general infantry and Marines whom he was tasked to protect. This title initially originated in jest among fellow SEALs following his taking of a sabbatical to train other snipers in Fallujah. He was wounded twice and involved in six IED attacks.

Kyle was honorably discharged from the US Navy in 2009 and wrote a bestselling autobiography, American Sniper, which was published in January 2012. On February 2, 2013, Kyle was shot and killed at a shooting range near Chalk Mountain, Texas, along with friend Chad Littlefield. The man accused of killing them is awaiting trial for murder. A film adaptation of Kyle's autobiography, directed by Clint Eastwood, was released in December 2014.