41.   Almost any large shark, roughly six feet or longer in total length, is a potential threat to humans.

42.   But Black says a potential threat to civil liberties lies with a combination of profiles and informants. . .

43.   But even as the government pushes its own Internet ventures, it is trying to stamp out others that it sees as a potential political threat.

44.   But he said the reports concerned potential threats from swimmers and divers.

45.   But in an interview with NBC News Putin acknowledged that he, too, recognizes a potential threat from small, unpredictable nuclear powers.

46.   But it has largely gone ignored and unnoticed, until anthrax scares turned white powdery substances into potential threats.

47.   But others argued that schools can no longer dismiss potential threats as childish pranks.

48.   But others worry that a number of potential threats lie ahead.

49.   But Republican senators retorted that Democrats are ignoring a growing number of potential threats of nuclear, chemical or biological missile attacks from countries other than China and Russia.

50.   But others in the medical establishment were sharply critical of the idea, saying it posed a potential threat to the quality of care.