in 1990, ukraine renounced the world third biggest nuclear stockpile. that was the biggest contribution into the global protection against nuclear catastrophe which has ever been done. and in exchange for that, our country received written assurances of the most powerful of the world, russia included, but these assurances did not become guarantees. in fact one of these countries started a war against ukraine. and this is the ultimate manifestation of injustice that you can possibly imagine. so what is the conclusion that other entries make from this? is it the conclusion that everyone needs nuclear weapons in order to protect themselves against the invasion? that is very hazardous for everyone. >> ukraine's president volodymyr zelenskyy there speaking by