It’s been a busy week for the impeachment investigation into President Trump. Some key witnesses testified about the US-Ukraine relationship and Republicans staged a controversial walk-in of a secure conference room. We’ll break it all down and describe the White House’s plans going forward. Meanwhile, protests in Chile are entering their second week. They started in part because of transit fare hikes but are about a lot more than that. Finally, US lawmakers are worried TikTok could pose national security risks.