Johnnie Walker has announced the launch of a new permanent release in the US, which is said to unite the character of American whiskey with the craftsmanship of Scotland. Johnnie Walker Black Cask (43% ABV) is a blended Scotch whisky comprising whiskies from distilleries including Cameronbridge, Glen Elgin and Roseisle, matured exclusively in American white oak ex-Bourbon barrels. Crafted by Master Blender Dr Emma Walker, the latest release has been…