A South Korean activist shouts slogans during a rally opposing President Barack Obama's Nuclear Posture Review (NPR) near the U.S. Embassy in Seoul, South Korea, Tuesday, April 13, 2010. The activists said Obama's plan is unfair because it allows Israel and India to possess nuclear weapons while taking issue with North Korea and Iran's atomic programs. Obama opened the global security summit Monday night after two days of meetings with selected presidents and prime ministers of the 47 countries assembled to recharge efforts to keep nuclear material out of terrorist hands. (AP Photo/Ahn Young-joon)