It says the bomb kit was fake, but it doesn't say that about the guns. Does that mean the guns were real?
If so, then this was almost DEFINITELY a terrorist act, and the fake bomb kit was to scare the passengers into not trying to fight back.
Did not one of the cell phone calls from UA 93 claim that the hijackers had taken over the plane with a bomb?
Seems to me this is one way the hijackers could've assured compliance from the passengers. Boxcutters alone don't seem like quite enough...