21.   Helicopters flew over the sprawling campus, raining tear gas on the students.

22.   Nine police trucks, three armored vehicles and a fire truck surrounded the sprawling campus to prevent students from pouring into the streets.

23.   Several hundred people fled south of the sprawling campus in central Tehran and set ablaze several empty buses in the commercial district, witnesses said.

24.   There were no reports of violence, but at least six trucks carrying police and two armed personnel carriers were posted outside the sprawling campus of Cairo University.

25.   Thick clouds of smoke from the burning tires billowed over the sprawling campus.

26.   Ambulances rushed through the sprawling campus, carrying away a trickle of exhausted students who stumbled out singly through barricades.

27.   Ten people were injured in scattered clashes across the sprawling campus but most workers fled into nearby mountains, union leaders said.