More than 1500 attendees welcomed; Dubai elected as the host of the 2018 WTC   From May 22 to 28 in Dubrovnik, Croatia, the International Tunnelling and Underground Space Association held its 41st General Assembly along with the 2015 World Tunnel Congress, co-organised with the Croatian Association for Tunnels and Underground Stuctures.   This International event, widely recognised among tunnelling professionals and experts, recorded more than 1550 participants, including attendees and exhibitors. 54 Member Nations of the Association, out of 73, were present.