
A U.S. Parks Police officer with an assault rifle patrols the Washington Monument in Washington, DC., after a bombing at the Boston Marathon in Boston, Mass., April 15, 2013. (Andrew S Geraci/The Washington Times)

U.S. Parks Police with assault rifles patrol the Washington Monument in Washington, DC., after a bombing at the Boston Marathon in Boston, Mass., April 15, 2013. (Andrew S Geraci/The Washington Times)

** FILE ** Travelers wait in security checkpoint lines before boarding planes at Reagan National Airport in Washington on Feb. 25, 2013. (Andrew S. Geraci/The Washington Times)

** FILE ** Travelers wait in security checkpoint lines before boarding planes at Reagan National Airport in Washington on Feb. 25, 2013. (Andrew S. Geraci/The Washington Times)

The Washington Monument, covered by scaffolding, lights up in the early morning sun, while cherry blossoms around the tidal basin bloom, in Washington, DC., Thursday, April 11, 2013. (Andrew S Geraci/The Washington Times)

The Washington Monument, covered by scaffolding, lights up in the early morning sun, while cherry blossoms around the tidal basin bloom, in Washington, DC., Thursday, April 11, 2013. (Andrew S Geraci/The Washington Times)

The Jefferson Memorial lights up under the cherry blossoms around the tidal basin bloom, in Washington, DC., Thursday, April 11, 2013. (Andrew S Geraci/The Washington Times)

Students visiting the district, sit on the edge of the tidal basin as they watch the sunrise in Washington, DC., Thursday, April 11, 2013. (Andrew S Geraci/The Washington Times)

Visitors take pictures and watch the sunrise around the cherry blossoms at the Tidal Basin, in Washington, DC., Thursday, April 11, 2013. (Andrew S Geraci/The Washington Times)