UNRAVELING THE PLOT.

Focuses on the investigation into the terrorist bombings in London. Reports on how advanced forensics and old-fashioned footwork traced the attacks to four suicide bombers from London with possible ties to al-Qaeda; Description of the four suspects believed to have carried out the bombing; Britons difficulty of accepting the idea that the suspects were Londoners; Discussion of how the biggest police investigation in British history has already unearthed a number of links between the bombers and al-Qaeda.