Is Ukraine about to go nuclear again?

A new global nuclear arms race may soon begin, and the world will have Putin to thank.

In 1994, Ukraine, the Russian Federation, the United States and the United Kingdom entered into an agreement to remove former Soviet nuclear weapons from Ukraine, later known as the Budapest Memorandum. Ukraine agreed to sign the Non-Proliferation Treaty.

In the history of nuclear weapons, only four states have ever walked away from nuclear capabilities: three post-Soviet states (Ukraine, Belarus and Kazakhstan) and South Africa, which had covertly developed a nuclear weapons arsenal.