Can North Korea's Kim Jong Un be trusted after Korean agreement? North Korean leader Kim Jong Un and South Korean President Moon Jae-in pledged to work towards peace and denuclearizing the Korean Peninsula. Michael Morell, CBS News senior national security contributor and former deputy and acting director of the CIA, and retired Navy Adm. Sandy Winnefeld, who was former vice chairman of the Joint Chiefs of Staff, join "CBS This Morning" to discuss what's next as President Trump prepares to meet with Kim.