The Transportation Security Administration in the U.S said starting in April, small knives with blades that are 2.36 inches or less in length and less than 1/2 inch wide will be allowed on flights. Other items that will be allowed on board as part of a passenger's carry-on luggage include billiard cues, ski poles, hockey sticks and lacrosse sticks. Items that had been prohibited like razors, box cutters or knives with a fixed blade are still not allowed on board. The ` said the decision was made to bring U.S. regulations more in line with International Civil Aviation Organization standards and would also help provide a better experience for travelers. (SOUNDBITE) (English) TRAVELER DAN WEBER SAYING: "I actually believe that the bad guys are way ahead of us. They can hide stuff and they can make plastic knives that won't be picked up, just as sharp as a --- So that's why I am saying, if the bad guys want to hurt us they are going to try to hurt us." After the September 11, 2001 hijacked airliner attacks, the U.S. government imposed a strict set of guidelines for what could be carried on board an aircraft - some of which differed from what other countries allowed passengers to carry on airplanes.