Woman in DC chase may have thought Obama was stalking her, sources say.
Police close in on the U.S. Capitol as people run for cover after reports of a shooting Oct. 3.
Police run after shots were fired on Capitol Hill in Washington, D.C., on Oct. 3. The Capitol was placed on lockdown. A woman tried to ram a car into the White House gate and was chased by Secret Service and Capitol Police.
U.S.Capitol Police surround a car with their guns drawn at the corner of Pennsylvania Avenue and 1st Street NW in this frame grab from Alhurra TV video taken during an incident in Washington on Oct. 3.
A black car speeds away from police on Oct. 3 near the U.S. Capitol.
Seen from the U.S. Capitol, tourists flee near the Senate side of the building Oct. 3 following reports of a shooting.
FBI agents in SWAT gear respond to reports of shots fired at the U.S. Capitol on Oct. 3.
Capitol Police enforce the lockdown at the U.S. Capitol on Oct. 3.
People watch as law enforcement officers congregate on Constitution Avenue after reports of shooting on Capitol Hill on Oct. 3.
Police officers attend to an injured officer after an incident near the Capitol in Washington, D.C., on Oct. 3.
Police swarm around a car on the grass near the U.S. Capitol on Oct. 3.
Tim Arnold takes cover as gunshots are heard at the U.S. Capitol in Washington on Oct. 3.
An injured person is loaded onto a U.S. Park Police helicopter on the Mall in Washington, D.C., on Oct. 3.
Rescue personnel surround a smashed U.S. Capitol Police car following an incident near the Capitol in Washington, D.C., on Oct. 3.
Police gather near Capitol Hill on Oct. 3.
A police officer checks out a car involved in an incident near the U.S. Capitol on Oct. 3.