A one-year anniversary special examining the future of nuclear power after the disaster at the Fukushima Daiichi plant in Japan. Among many stories, Alex Chadwick conducts an exclusive interview with an American nuclear technician who was working inside the Daiichi plant when the earthquake and tsunami struck. You will also hear tape recordings from inside the Nuclear Regulatory Commission's Emergency Operations Center, as it struggled to shape America's response to the Fukushima disaster. Chadwick speaks with PBS Newshour's Miles O'Brien, just back from Japan, about recovery efforts. Chadwick also profiles Greg Hardy, a Los Angeles-based engineer who has spent much of his career examining the vulnerability of nuclear plants to earthquakes. And you'll hear a story about the next generation of nuclear reactors, so small they can fit on flatbed trucks.