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Backlash over move to allow knives on US planes

Knives, scissors and other banned items recovered at airport security checkpoints are shown at an exhibit on 9/11 attacks, at the Smithsonian National Museum of American History in Washington, DC, September 1, 2011. A decision to scrap a post-9/11 ban on A decision to scrap a post-9/11 ban on pocket knives being carried by passengers on US aircraft has triggered an angry backlash from pilots, flight attendants and airline chiefs.