I’m always impressed at the ability of D.C. to host large events, but the Nuclear Summit yesterday and today was an especially amazing display of logistics, keeping 50 world leaders safe. Tall security fencing blocked off a several block area surrounding the Convention Center. I walked around the full perimeter, and it was eerily quiet without the usual traffic. In most places, there were not many visible police but it was clear that resources were in waiting to be deployed immediately if needed.

Meanwhile, a couple of blocks away, Global Zero staged a protest against nuclear weapons in McPherson Square, including a life-sized blowup of a weapon.