apartment at saint denis where they were all holed up, and interception communication played a key role in them locating the groupt the saint denis safehouse. >> paul cruickshank, thank you for the expertise on mali and this ongoing situation here in paris. the worst of the carnage on the friday night one week ago here last week took place at the bataclan theater where 90 people were murdered an attackers with kalashnikov rifles opened up fire on the kconcertgoers until the an elite unit of the french police moved in. anchor of nbc news lester holt spoke with the captain of that raid. this is the remarkable account of what happened. >> we took position at the enter of the theater, and then we discovered like a hell on earth.