41.   But former agents said the service maintained a list of people denied access to the White House for security reasons.

42.   But lawmakers said Clinton could waive the conditions for national security reasons.

43.   But in addition to the usual traffic congestion, some motorists were subject to spot checks by law enforcement officials for security reasons.

44.   But police stopped it for security reasons.

45.   But Sobri said the group did not have any name for security reasons.

46.   But the visit to Sarajevo was canceled for security reasons, and plans to go to Belgrade were blocked by opposition from the Orthodox Church.

47.   But they say they cannot do so for security reasons.

48.   But until Monday, it had never disclosed the precise size and location of the arsenals, citing national security reasons.

49.   Cheney left the White House after Bush delivered his address and remained separated from Bush for security reasons throughout Monday.

50.   Chirac has given few specifics about the plane tickets, saying only that he had paid cash, for security reasons, and that all was legal.