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All-time travel record screening the most passengers since the agency started and that happened during a hectic holiday weekend. passengers flying out for the fourth of july have been hit with long lines and thousands of delays and cancellations. >> there are more destruction this morning according to flightaware. more than 450 flights in the u.s. have already been delayed today. 260 canceled. cnns gloria pazmino shows us how airlines and travelers are coping. >> reporter: it is already shaping ...