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MD-07 20011228- MADRID,SPAIN: A security guard, right, looks at a pair of shoes from a passenger at a gate of Madrid Barajas airport on Friday, 28 December 2001. Security measures on all Spanish airports were tightened and shoes are being X-rayed after a passenger tried to ignite an explosive in his shoes on an American flight from Paris to Miami last 23 December. EPA PHOTO EFE/J.L.PINO