(WASHINGTON) — Despite Republican opposition, the House select committee tasked with investigating the Jan. 6 attack on the Capitol holds its first hearing.

The panel will hear from law enforcement officers who defended the building, including Capitol Police officer Harry Dunn and Metropolitan Police Department officer Michael Fanone. They both lobbied lawmakers in May, alongside the family of fallen Capitol Police officer Brian Sicknick, to form a bipartisan, independent commission to investigate the attack — an effort Republicans blocked in the Senate.

The House voted to form the select committee to which Speaker Nancy Pelosi has appointed eight members — six Democrats and two Republicans, Reps. Liz Cheney of Wyoming and Adam Kinzinger of Illinois, who broke from the GOP to vote in favor of creating the panel.

Here is how the news is developing. All times Eastern:

Jul 27, 9:53 am
Chairman: ‘This threat hasn’t gone away’

At the end of a video with never-before-seen footage of the attack, one rioter said they’ll be back, which Thompson said was a warning that “this threat hasn’t gone away” but “looms over our democracy like a dark cloud.”

Thompson closed his opening statement by saying while the attack was fueled by a “vile, vile lie,” his committee will be a beacon for uncovering the truth of that day.

“The rioters who tried to rob us of our democracy were propelled here by a lie. As Chairman of this Committee, I will not give that lie any fertile ground,” he said.

“We cannot allow ourselves to be undone by liars and cheaters. This is the United States of America,” he added.

Jul 27, 9:50 am
Chairman opens hearing with praise for officers, new video

Opening the hearing, Chairman Bennie Thompson, D-Miss., said there’s “no place for politics or partisanship” in their investigation and praised the police officers for testifying for the panel.

“For appearing here, and more importantly, for your heroism on Jan. 6, you have the gratitude of this committee and this country. You held the line that day, and I can’t overstate what was on the line: our democracy. You held the line,” he said.

“We’re going to revisit some of those moments today, and it won’t be easy,” Thompson added. “But history will remember your names and your actions.”

Thompson proceeded to play video from Jan. 6 showing the officers defending the Capitol from a violent, pro-Trump mob, intermixed with their pleas to each other over their radios.

“Just describing that attack doesn’t come close to capturing what actually took place that day, so we’re going to see some of what our witnesses saw on Jan. 6,” he said.

Jul 27, 9:37 am
Hearing gets underway

The House select committee’s first hearing is underway.

Chairman Bennie Thompson, D-Miss., and Rep. Liz Cheney, R-Wyo., will each deliver opening statements ahead of testimony from four police officers who defended the Capitol on Jan. 6.

Cheney will speak in place of Republicans, whose ranking member would typically be given an opportunity to make opening remarks after the committee chair — but House GOP Leader Kevin McCarthy pulled his members from the panel, leaving only Cheney and Rep. Adam Kinzinger, who took appointments from Speaker Nancy Pelosi.

Tuesday’s hearing is expected to go two to three hours and will feature new video elements from the attack.

Jul 27, 9:35 am
Chairman: Subpoenas for Trump, Ivanka, McCarthy possible

Ahead of the hearing, Chairman Bennie Thompson, D-Miss., left the door open to subpoenas for the former president and those close to him on Jan. 6.

“Wherever the investigation leads us,” Thompson told ABC News Correspondent Kyra Phillips, when asked also about subpoenas for the House GOP leader and Ivanka Trump. “We will look at who made phone calls to the White House that day, we’ll look at whether or not there were any text messages, where there any emails — all of that is part of the investigation.”

Thompson said the August recess for the committee will include a lot of work and include conversations with Attorney General Merrick Garland and the White House.

“We are looking for a cooperative investigation, so whatever it takes to get that cooperation we plan to do,” he said.

Jul 27, 9:26 am
Why did the committee start with police officers?

Rep. Adam Schiff, D-Calif., a member of the panel and chairman of the House Intelligence Committee, who briefed reporters on a call ahead of the hearing, said it was important to have the officers explain the brutality of what they confronted, with the help of video footage from that day.

Schiff said the officers can “put to rest some of the revisionist history, the effort to whitewash what took place and understand keenly the importance of getting to the truth about what led up to that insurrection and what happened thereafter.”

He added, “We didn’t want to compel anyone to testify that didn’t want to or didn’t feel that they could. A lot of those who were the most severely injured continue to struggle with the after-effects of that day, so we want to be sensitive to those concerns.”

Metropolitan Police officer Michael Fanone, who was seen on video getting brutally attacked by rioters, told ABC News Congressional Correspondent Rachel Scott he plans to testify in uniform and won’t let politics surrounding the committee hinder the truth in his testimony.

Jul 27, 9:21 am
What to expect Tuesday

At Tuesday’s hearing, titled “The Law Enforcement Experience on January 6th,” the panel will hear from police officers who protected lawmakers from rioters during the assault on the Capitol and have them explain new video footage showing what they experienced that day.

Harrowing testimonies are expected from Capitol Police officers Harry Dunn and Aquilino Gonell and Michael Fanone and Daniel Hodges of the Metropolitan Police Department.

Chairman Bennie Thompson, D-Miss., and Rep. Liz Cheney, R-Wyo., will each deliver opening statements ahead of testimony from the officers. The opening statements from police officers will each be roughly five minutes, though the committee won’t be enforcing the “5-minute rule” on members and witnesses as it typically does in major hearings. There will only be one round of questions.

The hearing is expected to go two to three hours and will feature new video elements from the attack, according to a congressional aide.

Jul 27, 8:53 am
Republicans blame Pelosi for alleged security lapse ahead of hearing

House Republican Leader Kevin McCarthy, joined by other Republican leaders and the five GOP members he appointed to the committee, held a news conference at the Capitol about an hour before the first hearing was set to began to air grievances about Reps. Jim Banks and Jim Jordan being rejected by House Speaker Nancy Pelosi.

The group attempted to place blame for Jan. 6 on Pelosi.

“The American people deserve to know the truth that Nancy Pelosi bears responsibility as speaker of the House for the tragedy that occurred on Jan. 6,” said Rep. Elise Stefanik, who replaced Cheney in her No. 3 GOP leadership role earlier this year.

One reporter noted that Pelosi didn’t say the election was stolen or call her supporters to the Capitol, asking McCarthy, “So are you trying to cover up what the former president’s role was on Jan. 6?”

“Nothing, we’re not pre-determining any questions. We’d like to be on the committee to ask them,” he replied, before resuming his attacks on Pelosi and the Democratic-led committee.

Jul 27, 8:30 am
Rep. Liz Cheney on ABC’s Good Morning America says subpoenas possible for McCarthy, Trump

With hours until the first hearing kicks off, Rep. Liz Cheney — one of two Republicans serving on the select committee — shot back at fellow Republicans criticizing her role in the probe, saying, “This is absolutely not a game. This is deadly serious.”

”There are some in my party, including Leader McCarthy, who continue to act as though this is about partisan politics, I think it’s really sad. I think it’s a disgrace,” she told ABC’s George Stephanopoulos.

She also said subpoenas for House GOP Leader Kevin McCarthy and even former President Donald Trump are possible.

“The committee will go wherever we need to go to get to the facts,” she said.

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