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.
(36)

A. persuaded
B. helped
C. stopped
D. warned