The 70th anniversary of the dropping of atomic bombs on the Japanese cities of Hiroshima and Nagasaki will undoubtedly be accompanied by images of the “mushroom clouds” that rose over both cities. Terrible and sublime, these images burned themselves into the consciousness of “the greatest generation” and every generation since that’s lived with both the legacy of nuclear war and the reality of nuclear energy. A new exhibition at the Art Gallery of Ontario titled Camera Atomica looks deeply at the interrelated nature of photography and nuclear war and peace to come away with a fascinating glimpse of the calculatedly manufactured “atomic sublime” — the fascination with such terrible power at our command that simply won’t let us look away.