What if a hurricane wiped out Houston, Texas, and terrorists attacked oil production in Saudi Arabia? "CNN Presents" looks at a hypothetical scenario about the vulnerability of the world's oil supply, the world's remaining sources of oil and explores the potential of alternative fuels.

CNN Presents: Undercover in the Secret State follows Korean-American journalist Jung Eun Kim as she tracks down a new breed of dissident in North Korea. These dissidents are using small digital cameras and cell phones to show the world the brutal life inside North Korea.