| 1 | A | B | C | D |
| --- | --- | --- | --- | --- |
| 2 | Nuclear Security Summit - History |  |  |  |
| 3 | Date | Country | City | Host leader |
| 4 | April 12–13, 2010 | United States | Washington, D.C. | Barack Obama |
| 5 | March 26–27, 2012 | South Korea | Seoul | Lee Myung-bak |
| 6 | March 24–25, 2014 | Netherlands | The Hague | Mark Rutte |
| 7 | March 31–April 1, 2016 | United States | Washington, D.C. | Barack Obama |

Question: Where and when was the first Nuclear Security Summit held?
Answer: The first summit was held in Washington, D.C., United States, on April 12–13, 2010.