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US President Barack Obama looks on as his nominee for US Attorney General, Loretta Lynch (L), the US attorney in Brooklyn, NY, smiles during an event at the White House in Washington, DC, November 8, 2014. President Obama expressed joy Saturday over the release of two Americans who had been held in North Korea, calling their liberation 'wonderful.' 'I think it is a wonderful day for them and their families and obviously we are very grateful for their safe return, he said at the White House ceremony held to announce the naming of his new attorney general, Loretta Lynch. AFP PHOTO / Jim WATSON (Photo credit should read JIM WATSON/AFP/Getty Images)

US President Barack Obama looks on as his nominee for US Attorney General, Loretta Lynch (L), the US attorney in Brooklyn, NY, smiles during an event at the White House in Washington, DC, November 8, 2014.      President Obama expressed joy Saturday over the release of two Americans who had been held in North Korea, calling their liberation 'wonderful.'  'I think it is a wonderful day for them and their families and obviously we are very grateful for their safe return, he said at the White House ceremony held to announce the naming of his new attorney general, Loretta Lynch. AFP PHOTO / Jim WATSON        (Photo credit should read JIM WATSON/AFP/Getty Images)