81.   But now that half a century has passed, it is time to put the home run in better perspective.

82.   But some things, it seems, have changed little in more than half a century.

83.   But the action baffled and embittered the Lercari brothers, who have taken care of the carousel for about half a century.

84.   But the school killings in Littleton, Colo., he said, had brought back images of the combat he faced nearly half a century ago.

85.   But there is no room for complacency about the future of a partnership that was created half a century ago, in a different world.

86.   But there was a pragmatic edge to the message from this campaign warhorse, who has been winning elections for nearly half a century.

87.   But von Frisch had been studying bees for half a century.

88.   But today, nuclear deterrence -- the underpinning of American security for half a century -- may be a dying doctrine.

89.   But we will never know if Joe Kennedy would have been the first Kennedy to lose a Massachusetts election in more than half a century.

90.   But yes, Lewis was read half a century later, and is read today.