Breaking tonight, new questions about the shooting at the White House Correspondents' dinner

and our first look at writings from the suspected attacker calling himself the friendly federal assassin.

The frightening moments inside a Washington ballroom.

The dinner to celebrate the free press turning violent an

attacker rushing past security charging toward the ballroom firing at agents

then tackled it was a chaotic and somewhat frightened situation here the president

and vice president rushed out.

I heard a noise.

I thought it was a trade going down.

Cabinet members, lawmakers, journalists taking cover.

And now the FBI descending on the suspect's neighborhood in California.

We're still investigating motive.

What we're learning about the man's

writings and what his family describes as bizarre behavior. The collection of weapons, investigators say

he had, and his cross-country trip ending at the Washington Hilton with a terrifying security scare

in the nation's capital. Our coverage begins right now. This is NBC Nightly News with

Hallie Jackson. Good evening. We are coming on the air tonight with that fast-moving investigation

into the shooting at the White House Correspondence dinner. New video out today. You see it here

showing the moment the suspect was taken down.

Not long after this, his sprint past security with multiple weapons, according to investigators,

inside the ballroom, secret service, rushing the president away, guests ducking under tables

while Trump administration officials were escorted out. Now, new pictures released late

...