The policy is aimed at allowing passengers to carry pen knives, corkscrews with small blades and other knives.

NPR: TSA To Allow Small Knives, Bats, Clubs On Planes

The policy is aimed at allowing passengers to carry pen knives, corkscrews with small blades and other small knives.

NPR: TSA Stands By Plan To Allow Small Knives On Planes

Some experts say security improvements since the attacks -- most notably reinforced cockpit doors, better intelligence and motivated passengers -- have made the strict prohibition of small pen-knives unnecessary.

CNN: March 7, 2013 -- Updated 0312 GMT (1112 HKT)

Some security experts say security improvements since the attacks -- most notably reinforced cockpit doors, better intelligence and motivated passengers -- have made the strict prohibition of small pen-knives unnecessary.

CNN: TSA to allow pocketknives, some sports equipment