Lester Holt signs off at the end of his first broadcast as anchor of #NBCNightlyNews | NBC Nightly News with Tom Llamas

TONIGHT: Lester Holt anchors NBC Nightly News from Washington, D.C. after American Eagle Flight 5342 carrying 60 passengers and four crew members, collided midair with an Army helicopter near Reagan Washington National Airport | NBC Nightly News with Tom Llamas

Lester Holt was 10 years old and living on an air force base in Alaska when he gathered around the television with his family and watched the first lunar landing. | NBC Nightly News with Tom Llamas

Lester Holt travels to Alaska – where he spent part of his childhood -- to get a personal perspective of a climate in crisis. Scientists are warning that rising temperatures are having a significant impact on the state – including melting glaciers – which contributes to rising sea levels and warming oceans. | NBC Nightly News with Tom Llamas