The anniversary of the Hiroshima bombing has become ever more poigniant since the
Fukushima disaster four years ago.
On March 11, 2011, a nuclear plant in Fukushima was extensively damaged as a result of a massive earthquake and tsunami.
It remains the worst nuclear accident since the Chernobyl disaster in 1986, and prompted a public apology from plant executives.
The clean-up operation goes on today.