BOSTON (CBS) - The FBI now has photos of bomb parts used in the Boston Marathon explosions. And we're just learning a lid to a pressure cooker, thought to have been used in the bombings was found on a rooftop at the scene, according to sources..
Authorities say the bomber packed nails and BB's into a pressure cooker. Three people died in the blast and more than 150 were injured. Tuesday night, hundreds of people showed up for a candlelight vigil on the Boston Common.
President Obama will head to Boston tomorrow for an interfaith service.