LONDON, Aug. 8 -- Zsofia Csaba, waitress at Sanctuary pub, rode subway to work every day until July 7, the day bombs exploded on three Underground trains and a bus, changing the rhythm of her life and her city. Since then, she has ridden bike, preferring not to use transit system where 52 passengers and four presumed bombers perished and 700 people were injured. One month after the terrorist attacks, London is trying to get back to normal but finding life has changed. Guests in some hotels are searched and wanded with metal detectors. Thousands of police officers patrol streets....