You missed the entire point. See Bulldawg's post above.
Operational (standard English) - Working, viable.
Operational (Pentagon-ese) - A level of war involving Division-sized elements confined to a given geographical region, limited in size and scope, ie: Operation Desert Storm.
The headline of the story you posted is totally misleading and way off base. The report it cites is a Pentagon report, written in Pentagon lingo. It doesn't say there was "no link" it says there was no "direct operational link."
Given that al-Qaeda doesn't do conventional warfare, using division-sized maneuver elements, this is hardly surprising.
Non-news.