Here's what I saw during Capitol evacuation

He said barely a word, just stared straight ahead at the backdoor entrance to the Senate Chamber. 

It was 2:15 p.m. Wednesday, and the U.S. Capitol was under assault, the most brazen attack on Congress since terrorists hijacked an airplane and attempted to slam it into the building more than 19 years ago. On Wednesday, a pro-Trump mob crashed into the building in a historic first that sent Washington into lockdown and prompted the type of evacuation that congressional security officials have been planning since 9/11 but had never had to execute. 

Moments before, I had been sitting in the Senate press gallery high above the chamber, watching Senate Minority Leader Chuck Schumer, D-N.Y., Senate Majority Leader Mitch McConnell, R-Ky., and other senators debate Republicans' unfounded objections to counting the electoral college votes that would seal President-elect Joe Biden's convincing victory over President Donald Trump. 

Suddenly, Vice President Mike Pence, who had been presiding over the chamber from the Senate dais, got a signal that it was time to move. 

A growing mob outside had breached the barricades and entered the Capitol. Pence was quickly ushered away by Secret Service agents. 

I bolted out of the press gallery hoping to find out what was happening. I bounded down the stairs to the second floor, where senators enter and exit the chamber. Then I heard it: Police clashing with rioters yet another floor below. I could hear a loud thwacking sound - possibly a billy club being wielded against the invaders. 

I retreated back up to the third-floor press gallery in time to see Sen. Kyrsten Sinema, D-Ariz., finish defending her state's electoral count for Biden. Then Capitol police and staffers ordered everyone into the Senate Chamber. 

For our own safety. 

I was ordered into a gallery that is reserved for family and close friends of senators - Rep. Greg Pence, R-Ind., the vice president's brother, had just been watching the proceedings there. But I climbed over several rails and chairs to get back to the usual press location, directly above where the vice president had been sitting as the presiding officer.

Soon, the Senate was sealed off and the session was adjourned. Capitol police raced around the two-story Senate chamber locking every set of doors. 

Then Sen. Amy Klobuchar, D-Minn., looked at her phone and announced: "Shots fired."

A veteran Capitol police officer tried to calm the senators, telling them that the report may not be accurate. But at 2:30 p.m., police ordered everyone out.

In the most dramatic moments of the siege, with armed officers in every corner of the Senate, police began barking out instructions. They marched us all - a phalanx of senators, staff and press - through office buildings in search of the safest grounds to shelter on the Capitol complex. 

We didn't know it at the time, but a similar scene was playing out on the other side of the Capitol, where the House Chamber was evacuated and lawmakers ran for cover in a secure location on their side of the building. 

We were not allowed to take the stairs, because the mob was on the floors below. So into the elevators and down to the basement we went, racing toward the Capitol Visitors Center. The CVC is a vast underground bunker of a structure that finally got built after 9/11. It cost roughly $700 million and has secure rooms and blast-resistant doors.

An officer, holding back two doors, ordered us to head toward the Russell Senate Office Building because the pro-Trump mob had also breached the CVC.

Some senators ran; some walked. Security guards held Schumer by the shoulders to whisk him along. 

In a sign of quick staff thinking, aides to the Senate parliamentarian rounded up several people to grab the boxes containing the electoral college certificates submitted by the states - documents needed to certify Biden's victory.

By 2:45 p.m. most senators and a collection of aides and media had gathered in the secure room. An officer informed us that we were safe and said it would take a while to secure the complex. In the meantime, police said they were trying to find buses to get us to safer ground. 

Without their cellphones, some senators were at a loss for how to notify spouses and other loved ones.

Back in the Capitol, police began a room-by-room search to find senators, staffers and reporters who had been left behind. One senior GOP aide, who has an office not far from the Senate floor, said he took a steel rod and barricaded his door when the pro-Trump mob approached. For what seemed like 20 minutes, he said, rioters banged on his door, trying to break in. 

Others huddled in silence in small rooms with doors locked and cellphones turned off while the rioters walked past. 

Inside the Senate's secure location, one senior officer ordered a set of underlings to go secure Sen. Tammy Duckworth, D-Ill., who lost both legs while serving in the Iraq War. She was hiding in her office three floors above, fearful of letting anyone in. The senior officer gave specific instructions of what to yell: "Senator Duckworth, Senator Klobuchar said come to the door."

A few minutes later, she appeared in the secure spot. 

Somehow, Capitol food service operations still appeared to be up and running through the melee. At 4 p.m. and 5 p.m., hundreds of box lunches and bottles of water were rolled into the holding spot. 

Senators, staffers, media and police wielding automatic weapons grabbed lunches of chicken and beef. 

Reporters were herded out of the main secure room and into an outside lobby. Senators stayed behind and began discussing what had gone wrong with the basic fabric of American democracy. Eventually, televisions were wheeled into the senators-only room so lawmakers could watch the chaos unfold for themselves. 

Pressure mounted on the few Republicans who had been objecting to counting Biden's electoral college votes, giving life to the mob's delusions of four more years for Trump. Just before 5 p.m., Sen. Ted Cruz, R-Texas, led a contingent of GOP objectors into a separate room to discuss whether to go forward with their challenge in light of the mob violence their protest had helped to inspire. 

After 6 p.m., more and more senators began talking about returning to the Senate floor in a show of Democratic force - an idea that echoed a decision by many members to return to the Capitol's eastern steps the night of the 2001 terrorist attacks. On that night, in a show bipartisan support, Republicans and Democrats stood together and sang "God Bless America."

At the other end of Pennsylvania Avenue, Trump blamed the lawmakers for the chaos. "These are the things and events that happen when a sacred landslide election victory is so unceremoniously and viciously stripped away," he tweeted.

A few minutes later, Sen. Tommy Tuberville, R-Ala., walked past reporters. He was asked what he thought about Trump's statement. Tuberville walked away, saying nothing.

Just before 6:45 p.m. - four hours after senators fled the Capitol - loud applause echoed from their secure room. 

They had decided to reconvene the Senate and the House, take back Congress from Trump's angry mob and seal Biden's victory.