On 27 April 2016, United Nations Secretary-General Ban Ki-moon addressed an audience, ranging from veteran officials to young leaders, on the need for the entry into force of the Comprehensive Nuclear-Test-Ban Treaty (CTBT). The event was held in Vienna, Austria, but was followed across the world via media coverage, livestream, and social media.
"No one can solve this problem alone, but together we can change things for the better."