Revealing mistake: About 3/4 through the movie, Bradley Cooper and his wife are talking in a bedroom or nursery. He takes his daughter and holds her - the baby is clearly fake.
Continuity mistake: When Chris visits Biggles in the hospital, he reaches out to shake Biggles' hand with his right hand, but then in the next shot, his hands have switched. (01:29:50)
Factual error: The ranger is wearing an airborne tab above his 2nd Batt patch. They do not wear the airborne tab, rather they just wear jump wings. (01:39:38)
Chosen answer: Chris has "shooter's strawberries" on his elbows, which are red callouses caused by lying in the sniper's position for long periods. He notices the same marks on the elbows of the father, and realizes that he too is a military sniper.
Sierra1