51.   The company says it does not know why the specific models of tires in question are plagued by problems.

52.   The Defense Department has paid for the production of an anthrax vaccine for soldiers for years, but that program has been plagued by problems.

53.   The intestinal problem had plagued him all day, but Palmer tried to ignore it.

54.   The Mir station has been plagued by problems since an onboard fire in February.

55.   The problem also plagues Likud but seems more severe for Labor.

56.   The same three problems plagued the Knicks again.

57.   The same problem has plagued the campaigns of Bob Dornan, Alan Keyes and Richard Lugar.

58.   The same problem plagued early TV advertisers.

59.   The room-size, high-resolution printers eliminate the returns and inventory problems that often plague conventional publishers.

60.   The two-part spacecraft that has been plagued by problems that significantly diminished its capabilities.