Global map of nuclear arsenals

• All numbers are estimates because exact numbers are top secret.

• Strategic nuclear warheads are designed to target cities, missile locations and military headquarters as part of a strategic plan.

ISRAEL

Israeli authorities have never confirmed or denied the country has nuclear weapons.

NORTH KOREA

The highly secretive state claims it has nuclear weapons, but there is no information in the public domain that proves this.

IRAN

The International Atomic Energy Agency reported in 2003 there had been covert nuclear activity to make fissile material and continues to monitor Tehran's nuclear program.

SYRIA

US officials have claimed it is covertly seeking nuclear weapons.