Biden taps longtime foreign policy officials for key positions
President-elect Joe Biden's Cabinet is coming into sharper focus as he gears up to announce key nominations this week. He has selected Tony Blinken to serve as secretary of state, Linda Thomas-Greenfield as ambassador to the U.N. and Jake Sullivan as his national security adviser. CBS News correspondent Nikole Killion joins CBSN from Wilmington, Delaware, with the latest developments.