- As the nation preparesfor President Elect,

Joe Biden's inauguration,

security is unprecedented

with a military force five times larger

than that in Iraq and Afghanistan.

This is the scene in the nation's Capitol.

Some 25,000 national guard troops,

armed forces on the ground,

blockades, barbed wire fencing,

and miles of security checkpoints

ahead of Joe Biden'spresidential inauguration.

The military working to make sure

there are no securityrisks within the ranks.

- [Walker] There areguardsmen from all 50 states,

all territories are here

supporting the District ofColumbia National Guard.

- I can tell you I'mworking in Washington, DC.

It's not the Districtof Columbia out there.

It's the District of Afghanistan.

I mean, it's bad.

I mean, it is hard to get anywhere in DC,

anywhere close to theCapitol or the White House.

And I've never quiteseen anything like this.

- [Charlene] Commandersare going over every aspect

of the security lockdown,

including vettingthousands of troops in DC

amid concerns of an insider attack.

- [Walker] It's just another layer.

And then a layer on top of that

just to be absolutely certain

but everybody joining themilitary is screened in

and for an event likethis, you're screened out.

- [Idler] So every guardsman takes an oath

and it's to defend the constitution

from enemies foreign and domestic.

And as we've seen,

sometimes the enemies area little closer to home.

- [Charlene] Monday, authoritiesarrested an army reservist

from New Jersey inconnection with the riot

at the US Capitol.

Timothy Hale-Cusanelli

reportedly admitted toentering the Capitol

as part of the insurrection.

Another concern, armed attacks,as well as homemade bombs.

- [Walker] We are partof the layered defense

to ensure that the bubble,

the bubble that will bearound the vice president

and the vice president electand the president elect

so that we can have apeaceful transfer of power.

- [Charlene] With nerves already on edge,

a security alert Monday morning

sent people running throughthe halls of Congress.

Turns out it was a smallfire at a homeless camp

about a mile from the USCapitol, but it was another sign

of the tension inside the nation's Capitol

after the deadlyinsurrection on January 6th.

All this as statecapitals are also on alert

for potential inauguration day violence.

Charlene Aaron, CBN News.