From his golf course in New Jersey on Tuesday, President Trump threatened North Korea “fire and fury” and warned that the country “best not make any more threats to the United States.” How should we interpret the latest escalation in tensions with Pyongyang? Plus: Why American law may block the biggest medical breakthrough in decades. Guests: Peter Baker, chief White House correspondent for The Times; Carl Zimmer, who writes about biology and genetics. For more information on today’s episode, visit nytimes.com/thedaily.