I take it this man is retired military..... Notice how they refer to him as Colonel to project moral authority over the military matters and omit it for Powell rank even though he was the Chairman JCS.
Secretary of State trumps Chairman Joint Chiefs of Staff in rank. S of S is in line for succession to the Presidency. The C of JCS is not. So it is correct to refer to Powell as former S of S, rather than General (retd.) or C of JCS.