Video Duration 02 minutes 50 seconds

US nuclear stockpile is world’s second largest

The United States is the only country to have used nuclear weapons, not once but twice.

The United States is the only country to have used nuclear weapons, not once, but twice.

Al Jazeera is taking an in-depth look at the state of nuclear weapons and the push for non-proliferation this month.

Al Jazeera’s Shihab Rattansi reports from Washington, DC.