LONDON, ENGLAND - JULY 07: 'Thought of Train of Thought, 2016' by Royal Academician Ron Arad is unveiled at St Pancras International station on July 7, 2016 in London, England. The piece has been commissioned for Terrace Wires, co-presented by HS1 Ltd. and the Royal Academy of Arts. (Photo by Tim P. Whitby/Getty Images for Terrace Wires)