UK - London - Teenage girls on their smartphones

Three teenage girls are lost in the world of smartphone apps and messaging, in Trafalgar Square. While in a very busy environment, the capital's main square in central London, the teenagers obsessively tweet and message their friends at home, completely unaware of their surroundings, absorbed in the functions of their devices and their young lives. Sitting on the walls of the fountains, they are isolated from each other and the noise around them. In the backgrounds are tourists enjoying the arch (Photo by Richard Baker/In Pictures Ltd./Corbis via Getty Images)