Former Boston police commissioner Bill Bratton and senior correspondent John Miller talk to the "CBS This Morning" co-hosts about the lockdown protocol instituted in Boston. Miller said that "Shelter ... more 
Former Boston police commissioner Bill Bratton and senior correspondent John Miller talk to the "CBS This Morning" co-hosts about the lockdown protocol instituted in Boston. Miller said that "Shelter in place usually used for chemical or biological attack." less 
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Fri, Apr 19, 2013 12:31 PM EDT