Especially in such cities as London, Berlin or Paris. You have to play Piccadilly to feel how hopeless, difficult and complicated the situation is in today's security services. Not as shocking as No Russian in Modern Warfare 2, not as atmospheric as the Chernobyl adventure in Call of Duty 4, but it's undoubtedly one of the most important sequences for the whole series. Piccadilly, taking place in London, is memorable and thought-provoking. In my opinion, this is the best, most powerful mission of Modern Warfare.
Call of Duty: Modern Warfare makes it perfectly clear how helpless today's police force is in the big cities of Western civilisation. The panic is gigantic and the perpetrators merge with the crowd. Another explosion drowns out the sirens of an ambulance just for a moment. British people asking for help look exactly the same as enemies with automatic weapons. All credit goes to Szymon Radzewicz ( link to the original article).