The MiGs in the movie are actually all F-5 Tiger, an American plane that it uses as a trainer & sells to other countries. In reality, there is no MiG-28. It is just an F-5. See more...
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Other: When Maverick goes to Charlie's house for dinner the first time, you see the "For Rent" sign in front of the house. At this time, she has said that she's only applied for another position. Much later, after Charlie and Maverick talk about her actually getting the promotion, he drives by her house on his motorcycle and seems to focus on the presence of the "For Rent" sign out front.