Factual error: The German fighters depicted in the film are Messerchmitt Bf 109 G-6s, and every single one of them is using the Rüstsatz VI gun pod, that is, 2 extra 20mm Mg 151 cannons. The Luftwaffe only equipped their Bf 109s with the gun pods when they were going to intercept bombers. In this movie, even on the fighter vs fighter missions, they have these gun pods, which is inaccurate, because the gun pods dramatically reduced the turning performance of the Bf 109s.
Factual error: When the agent searches for Abu Ahmed in Peshawar, Pakistan, in one scene he gets out of his car, and a shop named Bhatia sons appear in the background, a company based in Delhi, India. In the next scene he is walking down a market, where a sign board of Jaggi sweets, (existing in Punjab, India) is seen, with words written in Hindi (only to be found in India).
Continuity mistake: The German and British airmen are looking at the Northern lights. From the rear the men are apart, but the front shots of them show them much closer to each other.
Character mistake: It's said in the movie a vice presidential candidate never gave a concession speech. Geraldine Ferraro did this in 1984.