Bill Clinton says he feels 'terrible' for pushing a 1994 agreement with Russia that resulted in Ukraine giving up its nuclear weapons

• Bill Clinton expressed regret for his role in a 1994 agreement between Russia, Ukraine and the US.
• The agreement saw Ukraine give up nuclear weapons left over from the fall of the Soviet Union.
• Clinton said that if Ukraine still had the weapons, Russia would not have invaded.

Former US President Bill Clinton said that he regrets pressuring Ukraine to give up its nuclear warheads in a high-stakes negotiation in 1994.