from theepochtimes.com: Once the province of activists and stoners, the traditional pot holiday of April 20 has gone mainstream in the first state in the nation to legalize recreational marijuana. Tens of thousands gathered for a weekend of Colorado cannabis-themed festivals and entertainment, from a marijuana industry expo called the Cannabis Cup at a trade center north of downtown, to 4/20-themed concerts at the legendary Red Rocks Amphitheater — acts include Slightly Stoopid and Snoop Dogg — to a massive festival in the shadow of the state capitol…