Ambassador Mike Waltz, U.S. representative to the United Nations Rep. Jason Crow, a Colorado Democrat Rafael Grossi, director-general of the International Atomic Energy Agency Fiona Hill, senior ...

"Face the Nation with Margaret Brennan" airs on CBS News at 10:30 a.m. ET and streams on Paramount+ and CBSNews.com at 12:30 p.m. ET on Sundays.