NEW YORK, United States (AP) — An estimated 20 million people watched Thursday night’s hearing of the House panel investigating the January 6 insurrection at the US Capitol.

The figures released Friday by the Nielsen Company include viewers from 12 television networks that aired the rare primetime hearing, including ABC, CBS, NBC, CNN, MSNBC, and FOX Business Network.

The numbers do not include online viewers or those who watched on PBS.

The hearing, which aired from 8 pm to 10 pm on the US East Coast, made many elements of the ongoing investigation public for the first time, including a never-before-seen 12-minute video of extremist groups leading the deadly siege, and startling testimony from President Donald Trump’s inner circle.

By comparison, the opening day of each of the Trump impeachment trials drew about 11 million viewers. Those aired during the day on fewer networks, but the far higher figures from Thursday suggest that the primetime experiment succeeded in capturing national attention in a way usually reserved for live sporting events.

Fox News, which did not air the hearings, drew nearly 3 million viewers for the same two hours.

Last week’s highest rated television shows, the first two games of the NBA finals on ABC, each had between 11 million and 12 million viewers.