40 years after the fall of Saigon the physical scars of the Vietnam War remain. Cancers, birth defects and chloracne are a part of life for thousands of Vietnamese and Americans. Health experts blame Agent Orange, a powerful herbicide the US military sprayed across Vietnam as part of its herbicidal warfare program. So what's being done in response to this health crisis?

Protests in Nicaragua are growing in opposition to what could be the biggest engineering project in human history. Driven by a Hong Kong businessman, the canal would cut through the country, connecting the Atlantic and Pacific Oceans. Nicaragua says the $50 billion project will boost the economy. But critics say damage to the environment and indigenous communities isn't worth the price