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These bombs, looking for signatures in terms of how the were made, what kind of mponents were involved, wre those components might have come from to helpetmi w made them. how sophisticated they were. appant notve. but certainly, john, very, very they certainly were. a number of them. and the two that went off, and apparently unexplod bombs on the scene tha investigators are looking at. susan ndiott o tnks to you. w wt bring in the chair of the house homeland securit coite and we re joined by fran townsend, niolecurity analyst and former assistant to george w. bush for security and counterterrorism and with me in boston, cnn analyst julia kayam, a homeland security official right here inst. i want t start with you, corema as chair of t iss holand security mmittee. ....

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