Hiroshima, Japan, is marking 80 years since the U.S. dropped an atomic bomb on the city during World War II. Anna Coren has more.

Hiroshima, Japan, is marking 80 years since the U.S. dropped an atomic bomb on the city during World War II. Anna Coren has more.
A new study is shedding light on the health impacts of massive wildfires. Andrew Stokes, …