 White House correspondent Karen Travers. Karen, thank you for your coverage tonight. Stephen Portnoy in Milwaukee. And I think we can reiterate, Stephen, that as much as we do know, there's a lot more that we don't know this evening. And reporters will be working through the night by contacting their sources to try to find out what we don't know. These things include who is the man who fired these shots with an AR-15 style rifle? How did he obtain his weapon? Did he telegraph his intentions in advance? Were there clues missed?