President Biden argues for wartime aid to both Israel and Ukraine in his primetime address ahead of a potential ground invasion from Israeli troops in Gaza. Also, details on the team of researchers at the University of Pennsylvania that are working on a revolutionary vaccine for cancer. Plus, NBC’s Blayne Alexander previews this week’s thrilling episode of “Dateline.” And, legendary theater actors Vanessa Williams and Norm Lewis share their mission to bring more diversity to the theater.