This afternoon in Washington, DC, a woman tried to ram a White House barricade with her car, led police on a chase toward the Capitol where they later surrounded her, caused the Capitol to go into lock-down mode, rammed a police vehicle, and was eventually shot dead by the police. One policeman was injured, apparently when his car was rammed. The woman was later identified as Miriam Carey, a dental hygienist who lived in Connecticut, and was licensed to practice both there and in New York. A young girl, aged 2 or 3 years, was found inside the woman's car, and taken to a hospital.
The above is the short version of what I think happened today. The New York Post has some of the details here and here. The New Haven Register also has a report.