Tracy Morgan rose to the heights of comedy from the depths of poverty, growing up between Brooklyn and the Bronx. But five years ago, he nearly died in a horrific accident when the van he was riding in was crushed by a speeding tractor trailer. In this week’s “Sunday Sitdown,” Willie Geist talks to the former Saturday Night Live star about that accident and how it changed him, his return to comedy, and the newest season of his hit show “The Last O.G."