The fourth Nuclear Security Summit has started in Washington, the United States.

President of the Republic of Azerbaijan Ilham Aliyev is attending the summit.

The Nuclear Security Summit 2016 continues to provide a forum for leaders to engage with each other and reinforce commitment at the highest levels to securing nuclear materials.

The Nuclear Security Summit is a world summit, aimed at preventing nuclear terrorism around the globe. Leaders of more than 50 nations gathered in Washington for the fourth summit.

President of the United States of America Barack Obama opened the Summit.