At a hearing Wednesday, lawmakers released a large sampling of ads linked to Russia, which were intended to promote tension and division among American citizens during the 2016 presidential election season.

The ads were shown at the hearing, as executives from social media sites, including Facebook, Google and Twitter were slammed by members of a House Intelligence Panel.

Dianne Feinstein (D-Calif.) accused the three men representing the tech giants of not understanding the severity of the situation after she says they failed to answer her questions adequately the previous day.

“I don’t think you get it,” she said. “What we’re talking about is a cataclysmic change. What we’re talking about is the beginning of cyber warfare.”

“You created these platforms and now they are being misused,” she continued. “And you have to be the ones who do something about it — or we will.”

Below are videos which show samples of the ads paid for by Russian operatives.