51.   Most speculation centered on stepped-up NATO air strikes, a threat that has been used repeatedly during the three-year-old war, but rarely implemented effectively.

52.   Most speculation centered on stepped-up NATO air strikes, a threat uttered repeatedly during the three-year-old war but rarely carried out effectively.

53.   Most speculation centers Osama bin Laden and his terrorist network operating out of Afghanistan.

54.   Recent speculation has centered on Canadian deputy defense minister, Louise Frechette.

55.   Speculation has centered on the possible explosion of gas cylinders or small stoves passengers bring aboard trains to cook meals, despite regulations forbidding it.

56.   Speculation will now center on whether Mansell will quit the sport for good.

57.   Speculation centered on a political science professor, Cesare Marongiu, who was passing at the time the shot was fired.

58.   Speculation in Europe centered on Scot David Coulthard, Damon Hill of Britain and German Heinz-Harald Frentzen.

59.   Speculation also centers on Tory treasury spokesman Michael Portillo, the center-right son of a Spanish refugee.

60.   Speculation centered on the energy and education departments.