Laser Beams
This actually seems like a joke. Frikin' lasers?

WASHINGTON (AP) -- Terrorists may seek to down aircraft by shining powerful lasers into cockpits to blind pilots during landing approaches, U.S. officials warned in a bulletin distributed nationwide.

"Although lasers are not proven methods of attack like improvised explosive devices and hijackings, terrorist groups overseas have expressed interest in using these devices against human sight," the memo said.

"In certain circumstances, if laser weapons adversely affect the eyesight of both pilot and co-pilot during a non-instrument approach, there is a risk of airliner crash," the agencies said.

Sounds to me like the Department of Homeland Security is overstaffed.