A man stands in front of a mural along the Bellas Artes art museum in Mexico City, Tuesday, Sept. 1, 2009. As Bellas Artes continues work on its exterior, museum officials called upon a group of graffiti artists to paint their own murals along the plywood barrier, inspired by the muralists exhibited inside, such as Jose Clemente Orozco, Diego Rivera, David Alfaro Siqueiros and Rufino Tamayo.