Flashing red and blue lights everywhere you turnpublished at 13:58 British Summer Time
Ana Faguy
Reporting from Washington DC
Security in Washington is always tight, but streets blocks away from landmarks like the Capitol and the White House are usually relatively calm - that's not the case today.
Everywhere you turn outside the Capital Jewish Museum you can see flashing red and blue lights and officials in FBI uniforms.
Much of the area is blocked off with yellow caution tape and on every corner there are groups of television crews.