There's extra security around the Nation's Capitol this morning after yesterday's attack at the Boston Marathon.
Here, Capitol Police are warning visitors to expect a larger police presence. Key lawmakers have already been briefed, and more will find out details of the investigation today.
Yesterday, Congress observed a moment of silence for boston's victims.
This morning, the capitol flag remains at half-staff. Later today the FBI, Homeland Security and intelligence officials brief lawmakers on what they know about the explosions. "The most important thing is we do it right and we get the right information," said Rep. Dutch Ruppersberger, (D) Maryland.
Lawmakers were quick to call it an act of terror, but the president specifically did not.
He sent an FBI team to Boston promising justice. "We will find out who did this and we will hold them accountable," said President Barack Obama.
There's a security perimeter around the White House, and more security throughout the city this morning at airports and metro stations.
But Washington D.C. officials say the parade, concert and fireworks for today's emancipation day celebration will go on. "I want people to feel comfortable to take public transportation and enjoy yourself. I feel very comfortable it will be a safe event," said Washington D.C. Police Chief Cathy Lanier.
D.C. on high alert, as Washington tries to pin down the nature of the attack.