I'm pretty sure somebody decided to make a movie in which absolutely nothing is plausible. A security analysis manages to run all over New York and London being chased by absolutely everybody good and bad while wearing high heels and figuring out the details of the terrorist attack. Even her superiors in U.S. intelligence who, just three weeks earlier posted her to London because of her excellent record, immediately suspect her and give orders to kill because she didn't get killed in the bombing in the restaurant. She then manages to escape security at two major airports and throw a trained assassin off a building. This was just bad.