The world 3rd Nuclear Security Summit has concluded here today. Fifty three countries have participated in its workings, in addition to a number of international related organizations. Leaders of different and various countries have attended the summit, while the Kingdom's delegation to the summit was led by President of King Abdullah City for Atomic and Renewable Energy Dr. Hashim bin Abdullah Yamani. -- SPA 23:07 LOCAL TIME 20:07 GMT تغريد