21.   Pakistan reinforced its borders with troops and used helicopter gunships trying to block escape routes from the Tora Bora area.

22.   Pakistani troops, meanwhile deployed on the south side of the crest of the White Mountains to block escape routes for bin Laden and his al-Qaida fighters.

23.   Pakistan reinforced its borders with troops and patrolled the air with helicopter gunships in an effort to block escape routes from the Tora Bora area.

24.   Pakistani troops, meanwhile deployed on the south side of the White Mountains to block escape routes for bin Laden and his al-Qaida fighters.

25.   Police blocked routes all around the airport, creating huge traffic jams along key arteries that pass by.

26.   Police blocked routes all around the airport, creating huge traffic jams along key arteries that pass the airport.

27.   Ranchers in Chiapas, angry at rebel occupation of their lands, threatened to block the route.

28.   Although the trucks did not block those routes, Interior Minister Carlos Corach complained that the strikers were slowing traffic.

29.   At La Llorona, either they chose to stand their ground or escape routes were blocked.

30.   Both sides in the conflict are trying to block supply routes.