61.   Arlington, Va.-based USAir stressed that its discussions were preliminary but that talks centered on possible alliances, as well as an outright acquisition.

62.   Another spot, centered on a disastrous disaster movie, reminded investors that knowing when to sell might be just as important as knowing when to buy.

63.   As always, the dispute centers on the Muslim-dominated northern Indian state of Kashmir, where Islamic militants have stepped up their attacks on civilians.

64.   As in the earlier case, reaction has centered largely on whether school officials overreacted.

65.   Around the school system, where support for the chancellor has always been firm, students and teachers said, concerns centered mainly on how cutbacks were affecting education.

66.   As that work progresses, another question centers on what role the government should play.

67.   As speculation centers on several in-house candidates, it is useful to remember that Welch himself succeeded a man once regarded as a legend.

68.   Aside from isotopes, his work centered on the pharmacology and biogenetics of tumors of the central nervous system and the genetic markers of neurological and orthopedic disorders.

69.   At a meeting in Manila that ended Wednesday, the United States persuaded a group of Southeast Asian nations that any bailout fund should be centered on the IMF.

70.   As they brace for an address centered on these issues, the Republicans are a picture of fractious internal dissent.