s Secretary-General Ban Ki-moon cited today deeper global cooperation as "indispensable" to strengthening nuclear security, as he called on leaders to take the necessary steps towards ensuring a safer world for all. "My message to you now, today, is this: be the first mover. Do not wait for others to act. The challenge is one of leadership," Mr. Ban said in his remarks at the opening session of the Nuclear Security Summit, hosted by the Government of the Netherlands in The Hague. "Let us work towards a safer world for all – a world free of nuclear weapons and threat of nuclear terrorism." Calling nuclear security a "pressing concern," the UN chief noted that the primary responsibility for preventing non-State actors and terrorists from acquiring the most devastating weapons known to humanity lies with national governments. -- SPA 23:43 LOCAL TIME 20:43 GMT تغريد