epa05340269 (L-R) Italian Prime Minister Matteo Renzi, Austrian Chancellor Christian Kern, German Chancellor Angela Merkel, French President Francois Hollande and Swiss Federal President Johann Schneider-Ammann, arrive at the southern portal after they drove by train through the Gotthard from north to south, on the opening day of the Gotthard rail tunnel, the longest tunnel in the world, at the fairground in Pollegio, Switzerland, 01 June 2016. The construction of the 57 kilometer long tunnel began in 1999, the breakthrough was in 2010. After the official opening on 01 June, the commercial opperation will commence on December 2016. EPA/GABRIELE PUTZU
