Coming to the Mile High City this weekend (4/20/14) was the perfect 65th birthday present for Karen Stevenson. She and her husband drove out of the Bible Belt to experience, for the first time, what it's like to buy and smoke weed legally. She wore a T-shirt featuring an image of Maramp;iacute;a Sabina, a late Mexican shaman, puffing on a joint, a shirt that, until this day, she never dared to wear outside her Cape Girardeau, Missouri, home. It's kind of like being a part of history, she said Saturday, while waiting for a bus in front of a marijuana themed sandwich shop. I used to want to go to Amsterdam. Now I don't have to. The Stevensons are among the tens of thousands of visitors, by some estimates 80,000, who've come to Denver to mark 420 (April 20), a date that's emerged as a holiday among those steeped in cannabis culture. This is a weekend that draws people of various backgrounds and with different needs and desires. - CNN