Here, on the northern frontier with Lebanon, the mountain border is relatively porous, but in recent days on the Syrian side fresh minefields have been laid.

BBC: Syria refugees tell of civilian misery in besieged Homs

The UK Foreign Office has now warned British citizens not to travel to Pakistan and for those in North-West Frontier Province, Baluchistan and the Northern Areas to leave immediately.

CNN: UK supports bin Laden theory

And its overcoming that perception that makes touring the vineyards and wineries tucked in along the Northern Arizona wine trail a chance to explore a new frontier in wine making and tasting.

BBC: Touring northern Arizona��s wine country