Originally Posted By Pika
The blades on the box cutters used by the 9-11 terrorists were less than 6 cm long; a short, sharp blade can do a lot of damage. I can understand their concern.


The reason that box cutters worked on 9/11 was because of a different view at that time - cooperate with the hijackers. A paradigm shift occurred starting with UA93. Now with hardened cockpit doors and refusal to accede to hijackers, box cutters would not be successful.

For years, scissors with blades up to four inches have been permitted on planes. Pull them apart and you have two sharp knives, yet blood has not been flowing down the aisles.