Advertisement'All Hands On Deck': National Mall Is Closed As Agencies Fortify D.C.January 15, 2021Bill ChappellfacebookEmailU.S. park rangers look at the spot where the Rev. Martin Luther King Jr. gave his famous "I Have a Dream" speech on the steps of the Lincoln Memorial in Washington, D.C., on Friday. Security threats have prompted officials to shut down the National Mall and much of downtown Washington, D.C. (Getty Images)