On Wednesday, President Biden signed a bill into law that would force the sale of TikTok or ban the app outright. We explain how this came together, when just a few weeks ago it seemed unlikely to happen, and what legal challenges the law will face next. Then we check on Tesla’s very bad year and what’s next for the company after this week’s awful quarterly earnings report. Finally, to boldly support tech where tech has never been supported before: Engineers at NASA’s Jet Propulsion Lab try to fix a chip malfunction from 15 billion miles away.Guests:Andrew Hawkins, Transportation Editor at The VergeTodd Barber, Propulsion Engineer at Jet Propulsion LabAdditional Reading:‘Thunder Run’: Behind Lawmakers’ Secretive Push to Pass the TikTok BillTesla’s in its flop eraNASA’s Voyager 1 Resumes Sending Engineering Updates to EarthWe want to hear from you. Email us at hardfork@nytimes.com. Find “Hard Fork” on YouTube and TikTok. Subscribe today at nytimes.com/podcasts or on Apple Podcasts and Spotify. You can also subscribe via your favorite podcast app here https://www.nytimes.com/activate-access/audio?source=podcatcher. For more podcasts and narrated articles, download The New York Times app at nytimes.com/app.