America 250 celebrations in Washington, D.C., deemed national special security event

Washington, D.C., is bracing for the heat and ramping up security in advance of the nation's 250th birthday celebration on the National Mall.

CBS News homeland security correspondent Nicole Sganga reports on the security efforts.

Then, Amb.

Monica Crowley, U.S. chief of protocol and administration representative to Freedom 250, joins to discuss the festivities. ...