Corn farmers have a saying "knee high by the Fourth of July" to gauge whether their crop will be a good one, and we'll look at the grains that go into making "America's Native Spirit" with veteran Bourbon distiller Dave Pickerell on this Independence Day episode. Corn, rye, wheat, and barley each add their own unique character to a Bourbon, along with many of the exotic grains distillers experiment with, and Dave will break them down for us on this week's WhiskyCast In-Depth. In the news, Glasgow leaders give their blessing to a new distillery along the River Clyde, and we'll have more on new distilleries in Ireland and New Zealand, along with an update on new whiskies from Highland Park, Jim Beam, and Kininvie. This week's tasting notes include Barrell Bourbon, Jim Beam's new Signature Craft Quarter Cask, High West's American Prairie Reserve, and a rare Glengoyne 15 matured exclusively in Bourbon casks.