Pedestrian walks past barriers near the Walter E. Washington Convention Center in Washington, D.C., March 30, 2016. The fourth Nuclear Security Summit will be held here March 31-April 1, 2016. (Photo: Xinhua/Yin Bogu)
RIGHT BG
Pedestrian walks past barriers near the Walter E. Washington Convention Center in Washington, D.C., March 30, 2016. The fourth Nuclear Security Summit will be held here March 31-April 1, 2016. (Photo: Xinhua/Yin Bogu)
