The professional was a pathetic attempt at the life of an assassin.
Sniper is based on Gysgt Hathcock USMC. The finest sniper in the world. He had 93 confirmed kills and probably a thousand more that were kills, but not confirmed. He started the Marines Corps current sniper schools. He was so good that a bounty was on his head by the Viet Con.
Sniper is an excellent movie and for anyone who does not believe any of what they saw, you better visit the USMC because it really happened and the crawling in the open field and not being able to be seen is as real as it gets.
They were wearing gilly suits.