As world leaders gathered in Washington, D.C. this week for the start of a Nuclear Security Summit, activists gathered in McPherson Square on Friday urging them to eliminate all nuclear weapons.

Activists with the anti-nuclear group Global Zero rallied with a four-story inflatable missile, which they said represented one of the 15,000 nuclear weapons that exist around the world today, and called on leaders attending the summit to create an actionable plan to get rid of them.