It was yet another week of will-he-won't-he: Will President Donald Trump authorize the release of the House Intelligence Committee's "memo," in spite of senior FBI and Justice Dept. officials' warnings not to do so? (Spoiler alert: He did.) Will he continue to edge the U.S. closer to a devastating military encounter with North Korea — as he did for the first year of his presidency, and as he did during his State of the Union address earlier this week? And if the United States finds itself engaged in the unimaginable — nuclear conflict — what lessons will we learn from those who have already tried to imagine just that?

1. Steven Aftergood [@saftergood], transparency advocate, on the House Intelligence Committee's notorious "memo."

2. Lawrence Krauss [@LKrauss1], theoretical physicist and chair of the Bulletin of Atomic Scientists’ Board of Sponsors, on the Doomsday Clock's latest move toward midnight.

3. Marsha Gordon [@MarshaGGordon], film studies professor at North Carolina State University, on the 1983 film "The Day After," which imagines a massive nuclear strike in the Midwestern U.S.

4. Anne Washburn, playwright, on "Mr. Burns: A Post-Electric Play," in which she imagines American cultural life after a devastating nuclear event.

Songs:

Liquid Spear Waltz by Michael Andrews

White Man Sleeps by Kronos Quartet

String Quartet No. 5 by Kronos Quartet

The Glass House - Marjane's Inspiration by David Bergeaud

German Lullaby by The Kiboomers