CNN_2.jpg [1]
![](https://ploughshares.org/sites/default/files/CNN_2.jpg)
Joe talks with CNN's Tony Harris [2] about the Nuclear Security Summit and President Obama's pledge to secure all vulnerable nuclear materials within four years.
Links
[1] https://ploughshares.org/file/1720
[2] http://newsroom.blogs.cnn.com/category/anchors/tony-harris/