Shepard Fairey is best known for his iconic poster Obama/Hope which he made in support of Barack Obama for the 2008 US election.
Michael Desmond investigates the street art of Shepard Fairey, who was catapulted to fame during the 2008 presidential election with his resonant image of Barack Obama.
Nikki Toole has travelled the world to photograph skateboarders.
Technology has been a major influence on art since the invention of the camera, particularly in the field of portraiture.