Guinea Worm is a parasitic infection spread through unclean drinking water. It causes intense debilitating pain (so much that it was nicknamed "the fiery serpent"), and was once extremely prevalent across Asia and Africa. The Carter Center has worked hard to fight against Guinea Worm, and now, it's on track to be the second disease to be eradicated after smallpox.

What does it take to eradicate a widespread disease? And why did former president Carter choose to focus on this one? Is there anything else he wishes he could have used his powers as the president on?

Cenk Uygur speaks to former President Jimmy Carter to find out in the first part of this special interview.