User blog comment:Dr. Frohman/Modern Warfare/Black Ops Crossover?/@comment-3452233-20111128100400/@comment-1646362-20111128100838

It does. That's what Op. Charybdis is all about. Mason was still mentally unfit and a danger to everyone, so Hudson and Weaver went AWOL with him to protect him. Jonathan was sent to hunt them down.