GRAPHIC WARNING: Moments before a second night of curfew was imposed in Washington, D.C.
On Monday, violent clashes erupted outside the White House between U.S. military and park police and protesters demonstrating against police brutality in the wake George Floyd's death last week.
The police used stun grenades, and horses to drive back White House protesters ahead of U.S. President Donald Trump's address to the nation from the Rose Garden.
Following weeks of protests over the death of George Floyd while in police custody, curators from the Smithsonian in Washington..
