The London Marathon started with tributes to the Boston victims and a moment of silence.
British sports minister Hugh Robertson said the London Marathon, watched by an estimated 500,000 spectators and run through some of the city's most recognizable landmarks, should be staged as planned.
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Airline passengers go through strict security screenings BEFORE heading to the gate, but what about AFTER? In an eye-opening I-team investigation, see how simple airport gift shop trinkets can be turned into bombs in minutes. Watch our I-Team investigation, "Bombs Beyond Security," MONDAY on ABC7 News at 11 after "Castle" at 10pm.