But some western defense analysts believe the Shahab-3 is capable of carrying a nuclear warhead.

VOA: standard.2009.09.28

The highlights were several new missiles, including a ballistic missile that can carry a nuclear warhead and another one that has been nicknamed the "aircraft carrier killer."

VOA: standard.2009.10.01

The New Start treaty limits each side to no more than 800 deployed nuclear warhead delivery systems including bombers, missile launchers and nuclear submarines - a cut of about 50%.

BBC: US-Russia New Start nuclear treaty comes into effect

It rebuffed efforts by Secretary of Defense Robert Gates to develop a next-generation nuclear warhead.

FORBES: Nuclear Weapons: How Few Is Too Few?

It is not thought to have a missile capable of carrying a nuclear warhead.

BBC: North Korea tells South to leave islands