It has been almost three years since a major earthquake and tsunami led to the Fukushima Daiichi nuclear disaster, killing nearly 20,000 people and devastating the coastal and inland areas of Fukushima, Japan. Since then, questions remain unanswered about the health of thousands of people exposed to the radiation, the risks associated with the radiation leak and what’s being done to stop radioactive water from reaching the Pacific Ocean.

Next week, America Tonight presents an exclusive four-part investigative series about the real-world impacts of the disaster, efforts to return to normalcy in Fukushima and how the ongoing fallout could affect Americans' safety.