Adm. Mike Mullen

Then-Joint Chiefs Chairman Adm. Michael Mullen testifies on Capitol Hill in Washington, in 2011. Mullen, who retired six years ago, has expressed concern about escalating tensions with North Korea.

Mullen Expresses Concern Over 'Brinkmanship' With North Korea

1:25pm August 13, 2017

by Scott Neuman

The former chairman of the Joint Chiefs of Staff said he's very concerned that the hot rhetoric coming out of Pyongyang and Washington could spin "out of control."