Chat with us in Facebook Messenger. Find out what's happening in the world as it unfolds.

WASHINGTON, DC - MARCH 28:  U.S. Capitol police stand guard outside the U.S. Capitol after at least one person was shot in the Capitol Visitor Center March 28, 2016 in Washington, DC. The Capitol was placed in "lock down" following the shooting.  (Photo by Win McNamee/Getty Images)
WASHINGTON, DC - MARCH 28:  U.S. Capitol police stand guard outside the U.S. Capitol after at least one person was shot in the Capitol Visitor Center March 28, 2016 in Washington, DC. The Capitol was placed in "lock down" following the shooting.  (Photo by Win McNamee/Getty Images)

    JUST WATCHED

    Comparing past Capitol Hill shootings to today's scare

MUST WATCH

Comparing past Capitol Hill shootings to today's scare

Gloria Borger reflects.

Comparing past Capitol Hill shootings to today's scare

Gloria Borger reflects.