Alistair Sooke celebrates the genius of one of America's most prolific and original artists, Robert Rauschenberg. Fearless and influential, he blazed a trail for artists in the second half of the 20th century. Alastair travels to the east coast of the USA to talk to those closest to Rauschenberg to reveal the boundless curiosity and restless experimentation that kept him engaged till the very end of his career.