71.   As for whether mammography itself was improving, the investigators could not say.

72.   As investigators said they expect to be documenting the damage inside Columbine High School for weeks, prayer vigils and burials continued.

73.   As a result, federal investigators say that hundreds of cancer patients may have received treatment that was drastically weaker than their doctors had intended.

74.   As the employee left, Nelson three times offered to lock up the salvage yard, investigators said.

75.   As people on board screamed and the driver honked the horn, a police officer boarded the bus and one of the passengers subdued the suspect, investigators said.

76.   As recently as a few days before the slaying, the couple was taping home videos that investigators say show Rosenthal interacting pleasantly with his wife and child.

77.   As dusk fell, investigators say, a secret police force known as the Olympic Brigade opened fire on the crowd, provoking soldiers to begin shooting.

78.   At first, investigators said he was caught in a shootout by rival drug gangs.

79.   At first, investigators said it seems unlikely that reverse thrust from the right engine would make the plane bank to the left.

80.   Asian investigators say Cambodia, in particular, is awash in fake American money.