Five to six large suitcases filled with explosives would likely do a lot of damage, and I saw several of them being wheeled by a single adult in or near the packed queue, as the queue spilled into the common areas.
And while it might be less casualties in terms of bodies than a large plane, I think it would be more effective in terms of terror as there would be much more people directly affected.
Imagine what it'd do to all those waiting in the check-in queues when they experience the explosion and the aftermath.
That's why it scared me so much. It would have been such an effective move, requiring little skill and few actors.
I've never been scared of such acts before or since.
