Lester Holt revealed his plans to leave "NBC Nightly News." Why is he stepping down as anchor, and who could replace him? Here’s everything to know so far.

Lester Holt, the anchor and managing editor of “NBC Nightly News” for a decade, announced Monday that he is stepping down from the long-running broadcast at the beginning of the summer. Holt will continue to be a fixture at the network with a full-time role at “Dateline,

Lester Holt ’s announcement that he’s soon leaving his position as anchor at “NBC Nightly News” is only the latest in a wave of departures. And it comes at a moment when the national TV news media needs all the help it can get.