91.   As fears about bioterrorism and other forms of violence spread across the country, such warnings make for busy police.

92.   As knowledge of the art of making porcelain spread across Europe, the science of botany also was flourishing.

93.   As land plants spread across continents, Oliver said, they started to hit adverse environments, and in certain cases, regained the ability to be drought tolerant.

94.   As it grew, Abu Sayyaf fragmented into a half dozen sometimes squabbling factions spread across several tiny islands.

95.   As managed care spreads across the country, HMO practices have produced a sharp political reaction in many states.

96.   As testing has spread across the country, so have occasional boycotts, mostly student-led.

97.   As news of the pending freedom spread across Huntsville, people in the town festooned in yellow ribbons already began preparing for a party.

98.   As the missiles exploded, clouds of heptyl and its equally dangerous combustion products were spread across the surrounding countryside.

99.   As railroads spread across the country, replacing horses, more freight and more passengers were moved longer distances, faster, through all seasons.

100.   As presidential primaries spread across the land, they were seen as the means by which power was taken from professional politicians and given to the people.