Makes you wonder about the logistics of this all.
Moving around the plane opening hatches and tinkering with equipment requires there to be at least a few people. One to do the work, one inside the cockpit managing the flight and one looking after the passengers. All of them you would assume would have guns to keep the passengers from simply rushing them.
Getting multiple weapons past security surely means an inside job. And then what is the motivation for multiple people wanting to hijack this particular plane ?