A key part of solving the puzzle may be box-cutter knives or similar tools found on two flights made successfully, the same day that four United States commercial jets were hijacked and crashed, ...

The alert, sparked on October 17, saw more than 7,000 commercial American aircraft searched before they were allowed to take off. The use of box cutters has sparked memories of September 11.

SAVE $8.99: As of April 9, the Hoto Electric Screwdriver comes bundled with a Hoto Box Cutter for $43.99, down from $52.98. That's 17% off, and cheaper than buying the Hoto Electric Screwdriver on its ...