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World leaders focus on nuclear security, ISIS

Name: World leaders focus on nuclear security, ISIS
Uploaded: 2016-03-31T20:10:55-0400
Duration: 7 min 37 s
Description: President Obama is hosting more than 50 world leaders in Washington, D.C. for his fourth and final nuclear security summit. CBS News foreign affairs correspondent Margaret Brennan has the details.

President Obama is hosting more than 50 world leaders in Washington, D.C. for his fourth and final nuclear security summit. CBS News foreign affairs correspondent Margaret Brennan has the details.