51.   Airport officials said the plane was airborne for not much longer than a minute when it crashed, breaking into many pieces.

52.   Airport officials said there were also casualties on the ground.

53.   Airport officials say that often they have the money to build runways but are frustrated by an approval process that seems endless.

54.   Airport officials say the airport is probably the safest in the world.

55.   Airport officials suggest arriving two to three hours early.

56.   Airport officials tightened security in Chicago, in Kansas City, Mo., and in Florida.

57.   Airport officials were preparing for the worst.

58.   Airline executives, often backed by airport officials, said these tight relationships have benefits for travelers.

59.   Airport officials also advised passengers to expect some delays due to closer screening of baggage and other materials.

60.   Airport officials are also hoping to add so-called facial recognition computers to compare passengers with people on federal watch lists.