61.   Nearly four months after the accident, all Air France and British Airways Concordes remain grounded while investigators seek to pinpoint the cause of the accident.

62.   Since then, Lemieux has acknowledged he might have come back too early but has not pinpointed the cause of his pain.

63.   Scientists there have not pinpointed the cause.

64.   Tests on blood taken from the lobsters have not pinpointed the cause.

65.   The tests hopefully will pinpoint the cause of the accident, Culbertson said.

66.   The worker died last week, but the results of tests to pinpoint the cause were not available until Wednesday.

67.   They said pinpointing a cause of the crash will take weeks.

68.   While talking to reporters Tuesday, Lemieux said doctors had been unable to pinpoint the cause of the pain.

69.   Within hours, investigators were at work in the blackened engine room, still full of the charred remains of pipes and cables, to pinpoint the cause.

70.   A rash of sow deaths and miscarriages in at least five states has alarmed US pork producers and prompted federal experts to step up research to pinpoint the cause.