President Obama Attends the Nuclear Security Summit in Seoul, Republic of Korea

President Barack Obama travels on a three-day trip to attend the Nuclear Security Summit in Seoul, Republic of Korea.

President Barack Obama talks with Sung Kim, U.S. Ambassador to Republic of Korea, aboard Marine One during an early morning flight from Osan Air Base to the landing zone at U.S. Army Garrison Yongsan in Seoul, Republic of Korea, March 25, 2012. (Official White House Photo by Pete Souza)

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