class=p1The start of legal pot sales in Washington Tuesday marks a major step that's been 20 months in the making. Washington and Colorado stunned much of the world by voting in November 2012 to legalize marijuana for adults over 21, and to create state licensed systems for growing, selling and taxing the pot. Sales began in Colorado on January 1 of this year. Businesses including Cannabis City, which will be the first and, for now, only recreational marijuana shop in Seattle, got word early Monday morning from the state that they were licensed marijuana dealers. - The Daily News amp;nbsp;