Jamie Dimon himself is planning to pitch investors on the offering of Elon Musk’s rocket company, as banks prepare to reap huge fees from the largest I.P.O. ever.

Researchers relied on a newer gene-editing technique that may make it possible to engineer embryos, a prospect that has long alarmed bioethicists.

Nick Bilton said he had consulted with the program’s remaining correspondents: Lesley Stahl, Jon Wertheim and Bill Whitaker. All three were deliberating whether to stay with the show, two people said.