71.   Some experts wonder whether they can afford to escalate the verbal battle.

72.   Some legal experts wondered whether Microsoft jumped this week from a frying pan of secret negotiations into a potential fire in federal court.

73.   Some experts wonder if Abdullah will be able to negotiate the complex web of the Middle East.

74.   The problem is so entrenched and complex that some experts wonder whether truly effective measures are possible.

75.   Until now, some experts wondered if these protease-resistant viruses might spread poorly, because their mutations inhibited their ability to reproduce.

76.   Ukraine is fighting a growing diphtheria epidemic that has left experts wondering what happened to the millions of doses of diphtheria vaccine that Western countries donated last spring.

77.   Until recently, many experts wondered if a biological attack would go unnoticed for days, because the infection would be misdiagnosed.

78.   Some experts wonder whether the AIDS virus itself was transmitted to humans from primates.