Airline traffic is still struggling to make a comeback from the slump caused by the economy, war in Iraq and fears of terrorism. But with the start of the summer, the crowds may be returning soon. Here's a flyer's guide to some recent arrivals and departures at airports that are making life easier and tougher for passengers. --By Kate Novack
ARRIVALS
BAG-SCREENING MACHINES
As of Jan. 1, airports are required to screen all checked luggage. But the huge electronic detection machines that are now seen in many airports haven't slowed things down as much as some had feared.
FOOD TO FLY
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