The Senate Intelligence Committee finally got its chance Wednesday to grill Silicon Valley about Russian propaganda on their platforms during the 2016 election. And after months of relatively restrained disagreement between the committee and Google, Facebook, and Twitter, the conflict spilled out into the open.

The three companies have each sent their general counsels in lieu of their CEOs and other top executives, and these lawyers — Twitter’s Sean Edgett, Google’s Kent Walker, and Facebook’s Colin Stretch — mostly succeeded in dodging tough questions from the senators.

They’ve also had ample time to prepare for this week, as these companies have all revealed to Congress in the past couple months the extent of the Russia-engineered social media campaign to influence the 2016 election. Here’s a rundown of what they added to the story at Wednesday’s hearing: