During the Trump administration, Chris Krebs was the top cybersecurity official at the Department of Homeland Security. He spoke with WSJ’s Rolfe Winkler at WSJ Tech Live about the upcoming U.S. election and growing cyber threats from foreign governments.

For the past two years, tech billionaire Elon Musk has been having regular contact with Russian President Vladimir Putin. WSJ’s Thomas Grove reports on what we know about the nature of their conversations and why that contact raises potential national security concerns for some in the current administration.

Hans Zimmer, Academy Award-winning composer, and Golnar Khosrowshahi, CEO of Reservoir Media, discuss AI and the music industry, why human creation is still unique and whether or not Hans approves of The Journal theme music.