51.   Air traffic is not yet back to normal, but security precautions are in place, passengers are polite and the inconvenience of long lines is tolerable.

52.   Air traffic that courses so near the White House remains limited to about a third of what it was in preterrorist days.

53.   Air traffic there is heavy, and includes night flight training.

54.   Air traffic was banned around the stadium, eliminating the usual blimps and small planes with trailing signs.

55.   Airport runways were open but air traffic, struggling with thousands of delayed travelers, was not expected to return to normal for several more days.

56.   All commercial air traffic was halted at least until noon Wednesday.

57.   Also, the increased air traffic caused by relief airplanes and helicopters also restricted access, Lettis said.

58.   Both days fall prior to national holidays, when air traffic is expected to be heavier than usual.

59.   Both planes were flying without the guidance of air traffic controllers.

60.   But Anchorage was no longer needed after the fall of communism opened the shorter polar routes to international air traffic, and more fuel-efficient jet planes made refueling unnecessary.