From The Boston Globe:
Top investigators looking into whether intelligence agencies missed key warning signs before the Boston Marathon bombings said Wednesday that there was no “silver bullet” that would have prevented the attack but there were several holes in the system. Officials from the agencies said they are taking several actions to tighten intelligence-sharing and other procedures, as a series of congressional inquiries into the bombings winds down. The changes that are known publicly have not involved sweeping shifts in policy.
