The US Transport Safety Administration (TSA) is under pressure from some House members to reinstate the recently lifted ban on knives in planes, as reported by the Hill blog.
The TSA announced in mid-March 2013 that passengers will be allowed to take small knives (blades shorter than 2.36 inches) on-board aircraft for the first time since the 9/11 hijackings.
The new rules will come into effect in April 2013.
The move has been opposed by many airline cabin crew unions.
The TSA has defended the move with the argument that lifting restrictions on small knives will enable their officers more time to concentrate on more important security threats such as explosives and guns.