We recently got a note from the Albus Cavus Crew, who are about to embark on their Concrete Alchemy Tour, from May 16-23. 15 graffiti and street artists are heading out on a 5 city tour to show off their skills, but also talk about graffiti and its roles and potentials in communities. What seems to set this tour apart from other graffiti-type events is it's not simply a permission wall, or a gallery show, but a mix of mural painting on the sides of community centers, exhibitions, panel discussions and wall painting. The tour hits NYC, Princeton NJ, Philly, DC and National Harbor MD. Check 'em out.