NHK Documentary

About 70% of dementia patients suffer from Alzheimer's disease. Alzheimer's causes brain cells to die, leading to loss of memory and physical functions. A cure has yet to be found. As societies age, the number of people with Alzheimer's is expected to soar. From exercises anyone can do to new medications, we'll examine the latest efforts to defeat Alzheimer's.

In 1945, US forces dropped an atomic bomb on Nagasaki. Last year, photos and a map of the aftermath were found, detailing the bomb's destructive mechanism. They showed how the Mach stem - a shock wave that hyper-intensified the power of the initial blast - was responsible for destroying buildings with increasing force 500 meters from ground zero. Through a simulation of the blast and interviews with survivors, this program reveals how the bomb was exploded to maximize its catastrophic effect.

Soon after atomic bombs were dropped on Hiroshima and Nagasaki, a black rain containing radioactive materials fell from the sky. No detailed data has ever been released on where this contaminated rain fell, and the extent of this form of radiation. But at the end of 2011, enquiries by a doctor in Nagasaki led to the disclosure that investigators in the 1950s had collected data on some 13,000 people exposed to black rain. Why has this information yet to be released -- 67 years after the atomic bombings? And what might we learn from these cases today? Our investigation includes accounts from survivors.