Rising sea levels threatens farming along Chesapeake Bay

Near the Chesapeake Bay, farms have flourished for hundreds of years on the rich, fertile soil of coastal Maryland. But as sea levels rise, driven in part by climate change, encroaching saltwater is disrupting the livelihoods of many farmers. It's a preview of what other areas near saltwater may soon confront. William Brangham reports for our series on climate change and water, Tipping Point.