The Hiroshima bomb is the most devastating to have been used in real combat. But today’s nuclear weapons are far, far more powerful

Japan marked 80 years since the atomic bombing of Hiroshima on Wednesday with a ceremony reminding the world of the horrors unleashed, as saber-rattling between the United States and Russia keeps the nuclear “Doomsday Clock” close to midnight.

Wednesday marks the 80th anniversary of the Atomic bombing of Hiroshima, Japan — an event that helped end World War II but also brought the world into the nuclear age and the Cold War. Japan uses the anniversary to commemorate the lives of the Hibakusha, survivors of the bombing, and asks the world to heed the dangers of nuclear war.