The open letter concerning the Long-Term Lease Agreement Relating to Lastavica Island with Fortress ‘Mamula’ in Herceg Novi was addressed to President Krivokapić, which can be accessed below, was signed by Mr Boutros Boutros-Ghali, former UN Secretary General; Mr Federico Mayor, former UNESCO Director General; Mr Ashok Khosla, former President IUCN Council from 2008 to 2012; Mr Roberto Savio, President Emeritus, Inter Press Service; and Mr Maurice F. Strong, Secretary General at the 1972 UN Conference on the Human Environment