Which country signed the Treaty on the Non-Proliferation of Nuclear Weapons but left in 2003?

Linden, north Korea signed the treaty as stated. but in 2003 they withdrew or in essence crossed their name off so they could start their nuclear weapons program

Player Cosmo Chic, the guy that is running North Korea is a loose cannon!! I watched him on T.V. and online, and he is very, very scary!! He is going to be a problem with us, I think!!