Mount told the court there are ways to determine the source of the bomb residue.

CNN: Prosecution rests in embassy bombings trial

Authorities later announce that they recovered a pressure-cooker bomb after the pursuit into Watertown, a source briefed on the ongoing investigation said.

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The FBI is also looking at locations in the Denver, Colorado, area where bomb-making materials may have been purchased, a law enforcement source said.

CNN: Afghans were targets of New York terror raid, source says