First let me say that I have nothing but the utmost respect for the memory of sniper Chris Kyle. He was a true hero and he did his duty with the utmost skill. My question is what the hell is a US Sailor doing on a rooftop in the desert? Seals are trained as Sailors. They go through Navy Boot Camp and learn whatever boot sailors learn like tying knots and swabbing decks and they have Navy ratings. I read Luttrell's book and it seems that Basic Seal training centers around withstanding hypothermia and paddling around in rubber boats. The best example of a Seal mission was rescuing Capt. Phillips from the Somoli pirates but they have no reason to be on a rooftop in the desert or on patrol in the mountains. The problem for the Navy was that they kept cranking out Seal graduates and started believing the hype and since we haven't had a Navy war in 75 years they didn't have much to do so they expanded the mission. The U.S. Army Rangers and Special Forces are well equipped to handle sniper missions and the Marines have had skilled snipers since the late great Gy. Sgt. Carlos Hathcock was killing V.C. Luttrell's book indicated that the Seals aren't really that good at ground tactics since his patrol was surrounded and wiped out and the hastily formed rescue was wiped out before they got off the helicopters. Luttrell was ultimately rescued by Army Rangers while hiding out in an Afghan village rather than rescued Afghans in a battle as the movie suggests.