Continuity mistake: There are several fist fights between Cain and Adam. In most of them one scene does not relate to the previous one. For example, Cain is walking away, and the next cut shows them embraced in a shoving match. This discontinuity happens in many encounters.
Plot hole: Echelon controlled satellites hit targets on Earth with pinpoint accuracy. A lot of them involve creating storms to ravage an objective. One of them is started over 18 hours away from the target (how they know is another mystery), but this is what gives the characters time and allows the movie plot to continue to the end to defeat Echelon.
Factual error: A library assistant is showing his cellphone to a Fed. The Fed pulls out his gun and shoots the assistant from about 8 inches away into his left temple. Another Fed, standing to the immediate right of the assistant is shown after the shot. But there is no blood or material spray on him at all. His white shirt is immaculate. In fact, there is no blood anywhere.
