International Business Times | Obama To Host His Last Nuclear Security Summit; North Korea, Terrorism Likely To Dominate Talks International Business Times GettyImages-161611168 A South Korean protester sprays on a North Korean national flag during a rally in Seoul, South Korea, on Feb. 13, 2013. Photo: Getty Images/Chung Sung-Jun; Obama (2) U.S. President Barack Obama gestures as he speaks during ... North Korea in focus as Washington nuclear summit kicks off Ahead of Modi Visit, India, U.S. Discuss Terrorism Cooperation With ambitions tapered, Obama opens his last nuclear summit |