In the Khartoum, he asks the border guard "What's the issue?" I the late 1970s, the misuse of the word "issue" to mean "problem" had not yet become in vogue (which wouldn't happen until the mid-1990s).
The movie states the events took place in 1980 but in one of the scenes, they used the Duran Duran song "Hungry Like A Wolf" which was actually released two years later in 1982. The character Sammy sings the words to the song while strumming a guitar around a fire.
The goof item below may give away important plot points.
During the final rescue the US Air Force pilot tells Ari that the C-130 has a maximum capacity of 228 people. The C-130 Hercules has a maximum capacity of 128 troops, far less than that and well under the 400+ refugees loaded on the final airlift.