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Airport baggage screeners in the USA, displaying seized chain saws, machetes and knives, 21 travelers to check their luggage for offensive objects before boarding a 22 Officials of the Transport Security Administration (TSA) 23 that since February 2002 more than 7.5 million 24 items had been seized. They included 50,000 box cutters--a 25 said to be used by the Sept. 11, 2001 hijackers --and 1,437 firearms as 26 as 2.3 million knives. The TSA officials told a news conference most people with 27 items in their bags intended no malice but advised 28 to consult the website www.tsatraveltips.usa for advice on what to leave behind when 29 a trip. Since the Sept. 11 attacks screeners have confiscated seemingly 30 items like nail clippers and cigarette lighters 31 passengers. But some carry more obviously 32 items. Chain saws, a weed cutting machine, hand saws and machetes, steak knives, bottles of camping stove fuel and perfume bottles shaped like hand grenades were among items 33 as a sample of objects seized at New York's John F. Kennedy International Airport. While some carry-on items may have been 34 --a hockey stick or a child's plastic sword --other 35 by TSA have yielded razor blades in tennis shoes and a bayonet hidden in a hollowed-out artificial leg.