investigation? >> i don't think bulk data collection was an enormous factor because generally that deals with overseas calls to the united states. but what bulk data collection did was make the process more efficient so there were no silver bullets there but when you do have really tapped out resources to cover so many investigations it can help you move through and discard some faster. so in that regard it may have played not a major role but some supportive role. >> michael leiter, pete williams, thank you both. in what may be a preview of what the president will say tonight, president obama did address the investigation and terrorism in his weekly address this, of course, aired yesterday. >> it's entirely possible that these two attackers were radicalized to commit this act of terror and it would underscore a threat we've been focused on for years, the danger of people succumbing to violent extremist ideologies. we know isil and other terrorist groups are encouraging people around the world and in our country to commit terrible acts of violence. often times as lone wolf actors. >> for the latest on the