Dance legend Virginia Johnson, Artistic Theater of Dance Theater of Harlem, discusses the collaboration with Pittsburgh Ballet Theater under way at the August Wilson Center through March 24 and the many events taking place around town. It’s the 50th anniversary of her company where she danced beginning in 1969.  In a corner of the arts world where not too long ago dancers could only purchase white satin pointe shoes Virginia thinks progress is being made. No matter what the ethnicity of the dancer body shape self-image is  an issue. Discussing  the great success of Misty Copeland, star of the American Ballet Theater, there may be more stars equal to her talent in the future and no doubt there have already been some we just didn’t know about while the spotlight was elsewhere as Virginia explains to Jim Cunningham.