TERROR ON THE THAMES.

Reports on the London subway attacks. Worldwide reaction to the bombings; Damage to London's subway tunnels; Evidence being gathered by investigators, including hours of video footage from surveillance cameras; Comments from a U.S. senior intelligence official, suggesting the bombings fit the methodology used by al Qaeda; Discussion of London's large Muslim immigrant population; Similarities between the London attacks and those in Madrid in 2004; Organizational changes at al Qaeda; Speculation about more attacks forthcoming.