Wolf Blitzer delivers the most important breaking news and political, international, and national security stories of the day. Tune to The Situation Room weekdays 5-7pm ET on CNN.
It started this afternoon with a confrontation at the White House. Not all of the details are known yet, but police say a woman in a black sedan struck the barricades there that protect the grounds and fled. CNN's Tom Foreman tracks the car chase that followed and ultimately led to one officer injured and the suspect dead on Congress's doorstep.