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.

The newscaster will continue his full-time role as the lead anchor of NBC's "Dateline." Seasoned NBC journalist Lester Holt has announced that he is stepping down as the anchor of NBC Nightly News, joining a growing list of newscasters who are parting ways with NBC amid network shakeups.

Lester Holt, the trusted face of “NBC Nightly News” for the past decade, is stepping down from the newscast this summer. Holt will continue to host “Dateline NBC,” the network’s prime time newsmagazine.