Alexander Calder and Pablo Picasso are two of the foremost figures in the history of 20th-century art. The touring exhibition “Calder-Picasso,” which debuted at the Musée national Picasso-Paris and is on view at the High Museum of Art this summer (June 26-Sept. 19), reveals the radical innovations and enduring influence of these two artists through more than 100 paintings, sculptures and works on paper spanning their careers.