[xone]

The plane needs a mile long runway to land

Depends on the gross weight. 110,000 pounds of difference for landings under 5000 ft at sea level.

[Owl558]

“110,000 pounds of difference for landings under 5000 ft at sea level.”

Do you think terrorists could build such a runway, however long required, and manage to keep it secret? It seems possible to me, but pretty improbable. Then again...