51.   Hull and other specialists said similar mistakes have occurred before, but are rare.

52.   I am hearing some sloshing of water in the pipes when the heat comes on, which did not occur before.

53.   If there is a vote, incoming House Speaker Bob Livingston, R-La., says he wants it to occur before Christmas.

54.   If Waters lands the job, it would mark a coupling of applicant and employer that almost occurred before the start of spring football practices.

55.   In El Paso, Border Patrol spokesman Doug Mosier said death threats by drug traffickers have occurred before.

56.   In every case, he insists, the greatest improvement occurred before the government got involved with some program.

57.   In the carefully worded statement, the university distanced itself from any wrongdoing because the violation occurred before Fowlkes enrolled at Cal.

58.   In June, when Chinese officials last detonated a nuclear device underground, they said publicly that one final explosion would occur before the end of the year.

59.   In this case, the president asks the high court to extend that protection to lawsuits about wholly personal matters, or incidents that occurred before his election.

60.   In the United States, the predicted peak will occur before midnight Wednesday, when viewing is not at its best.