The earthquake and tsunami that hit Japan on March 11, 2011, lasted for many terrifying minutes. But the multiple nuclear meltdowns that followed created an emergency that lasted for weeks and a legacy that will last for decades.
Here's how the event unfolded. The tsunami knocked out power to the Fukushima Dai-ichi nuclear power plant. As a result, the cooling systems failed and three reactors melted down. Steam laced with radioactive material poured into the air. Water contaminated with radiation also flowed into the sea.
Teacher Dave Rowlands is talking to his students in a kindergarten class at Imagine Japan, an English-language school in the Miyagi Prefecture of Sendai City. The school is just a short walk from pre-fabricated homes built for families who lost more than just property in the earthquake and tsunami last year.
"What came after the earthquake, was what?" Rowlands asks. "A tidal wave. In Japanese, what do we say? Or in English, actually, tsunami is now used around the world in many languages. Tsunami. We kind of leave the 't' off of there."