What Kind of Notification System Works Best When Crisis Strikes?

(Wally) Czerniak was attending a conference in Arizona where he was learning, among other things, about emergency-notification systems that can send text messages to cellphones - a method that a growing number of colleges have set up since the shootings last spring at Virginia Tech. But Mr. Czerniak still isn't sure whether such a system would have done much good in keeping people on campus updated as the crisis unfolded if it had been in place at Northern Illinois.