Photos: Lockdown at U.S. Capitol
Matthew Verderosa, chief of the U.S. Capitol Police, talks to reporters about the shooting.
(Michael Reynolds / EPA)A police officer stands guard at the U.S. Capitol complex in Washington on Monday.
U.S. Capitol Police officers secure the Capitol visitor center, where the shooting took place.
(J. Scott Applewhite / Associated Press)Police outside the U.S. Capitol after the shooting.
(Win McNamee / Getty Images)Tourists are directed away from the U.S. Capitol.
(J. Scott Applewhite / Associated Press)A police officer outside the Capitol complex.
(Brendan Smialowski / AFP-Getty Images)The Capitol was locked down after the shooting.
(Win McNamee / Getty Images)Streets were blocked during the lockdown.
(Brendan Smialowski / AFP-Getty Images)The scene outside the Capitol visitor center.
(Alex Brandon / Associated Press)