This is a utility knife. On 11 September 2001, terrorists using tools just like this cut the throat of at least one flight attendant, letting her bleed to death as they took over an airplane and turned it into a missile. A pilot was also killed by a utility knife.
Now the Transportation Security Administration will allow small knives, scissors and other such tools to be carried aboard aircraft. Their reasoning is that cockpit doors and such have been reinforced and terrorists will be unable to use planes as bombs.
Fine. But what about the flight attendants? Passengers? Granted, in this day and age, passengers would probably fight to the death to prevent a hijacking, but why give anyone the tools to threaten, harm or incapacitate other passengers when you're 30,000 feet up in the air? Bad idea by ignorant bureaucrats. Make the screeners do their jobs. There is no need for anyone to have a box cutter, a Leatherman, a Swiss army knife and certainly not an icepick, knitting needle or throwing star in the passenger compartment of a plane.