A former chairman of the U.S. Joint Chiefs of Staff says use of nuclear weapons has grown more likely amid increasing uncertainty over North Korean leader Kim Jong Un's intentions.
Speaking Sunday on ABC's "This Week," retired Adm. Mike Mullen called the possible use of nuclear arms in the future "more probable than it used to be."
"They're the most dangerous weapons in the world," Mullen said. "And certainly if we have someone in North Korea that has a lethal legacy, is very, very unpredictable, and sees this as a way to solidify his future, that he could well not just attain them but potentially use them."