U.S. Vice President Joe Biden pays a silent tribute to former South African President, the late Nelson Mandela, before his speech at Yonsei University in Seoul, South Korea, Friday, Dec. 6, 2013. (AP ... more 
U.S. Vice President Joe Biden pays a silent tribute to former South African President, the late Nelson Mandela, before his speech at Yonsei University in Seoul, South Korea, Friday, Dec. 6, 2013. (AP Photo/Lee Jin-man) less 
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Associated Press | Photo By AP Photo/Lee Jin-man
Fri, Dec 6, 2013 12:00 PM EST