21.   Dense smoke often grounds government helicopters, forcing firefighters to slog for hours across mountainous terrain to reach fire lines.

22.   Deyoe said that landings were somewhat more difficult in mountainous terrain, but that Cali was no more difficult than Salt Lake City.

23.   Even hiking in the mountainous terrain is something that a Midwesterner needs to keep in mind, especially when planning an escape route.

24.   Even as suburban Scottsdale grows eastward, it is buffered by enough desert and mountainous terrain to maintain at least a semblance of remoteness.

25.   Given the reluctance of western governments to face the messiness of ground warfare in mountainous terrain, military aid to Montenegro would presumably take the form of air support.

26.   Heat-detecting infrared sensors have failed to spot the anti-government recluse and former airborne soldier in the thick woods and mountainous terrain.

27.   He was pointing at the mountainous terrain and describing the difficulty of hitting targets.

28.   Heavy rain is likely in northern California, where local amounts will exceed two inches as the moist air is forced to ascend the mountainous terrain.

29.   In the craggy mountainous terrain of the ancient trading route between Pakistan and Afghanistan sits Dara, a town known the world over as an open market for arms.

30.   Is that because better policing is forcing traffickers to try their luck farther south, where the mountainous terrain is harder to patrol?