In this 1958 interview, journalist Mike Wallace interviews Henry Kissinger, a prominent realist scholar who would later become National Security Adviser under President Richard Nixon. Kissinger discusses the impact of nuclear weapons on American foreign policy.

http://www.c-spanvideo.org/program/110723-1

In this 1987 speech at the Berlin Wall, President Ronald Reagan famously asked Soviet President Mikhail Gorbachev to “tear down this wall” – one of the final chapters of the US-Soviet Cold War.

Although only two nuclear weapons were ever used in war, hundreds of nuclear weapons have been tested and nine states currently have nuclear capabilities. This brief video walks you through almost 70 years of nuclear testing and proliferation.