Call to Secure Nuclear Material at Seoul Summit
![](https://media.wnyc.org/i/800/0/c/85/photologue/photos/106666360.jpg)
U.S. President Barack Obama arrives at the Seoul Airport for the 2010 G20 Summit on November 10, 2010 in Seoul, South Korea.
( Chung Sung-Jun / Getty )
( Chung Sung-Jun / Getty )
Produced by Javier Guzman