The first ever nuclear weapon was detonated by scientists in the USA on 16 July 1945. The secret initiative to develop the atomic bomb was nicknamed the Manhattan Project. Hear from two scientists, Roy Glauber and Ben Bederson who worked on the project in the closed city of Los Alamos in the desert of New Mexico.

(Photo: A nuclear explosion in the desert in the US. Credit: Keystone/Hulton Archive/Getty Images.)