Based on actual events

Is this just a term that is being applied to things that someone made up in their head. At no point did anyone use a grenade in an assault during the 90s in america let alone two of them in one city. Furthermore, what kind of fbi is this? There would be corruption indictments if any of the *beep* that happened in this film went down. This one time when I was a kid I saw a car drive by, but it actually was a spaceship and it was from jurgon 6 and they abducted me and I became king of their homeworld because I was taller than everyone else. Based on a true story that I made up