Police presence was increased in London though there apparently was no specific intelligence of a possible attack. (Andrew Stuart / AP)
London commuters take a subway train on the Piccadilly Line, which was reopened for the first time since the July 7 bombings. (Scott Barbour / Getty Images)
HIGH ALERT: Armed police officers patrol in central London. Many residents have welcomed the departure from tradition in the wake of the deadly attacks. Police continued to hunt for the July 21 suspects even as they arrested nine men in southwest London. (Hugo Philpott / EPA)
