A-bomb marker Hiroshima Mayor Kazumi Matsui offers a new list of dead during the 73rd anniversary memorial service for the atomic bomb victims at the Peace Memorial Park in Japan. AFP TOKYO — A bell tolled Monday in Hiroshima as Japan marked 73 years since the world’s first atomic bombing, with the city’s mayor warning that rising nationalism worldwide threatened peace.

The skies over Hiroshima’s Peace Memorial Park were clear, just as they were on 6 August 1945, when an American B-29 bomber dropped its deadly payload on the port city dotted with military installations, ultimately killing 140,000 people.

Hiroshima Mayor Kazumi Matsui, standing at the park near ground zero for the annual ceremony, made his annual call for a world without nuclear weapons and warned of the threat of rising nationalism.

Without naming specific nations, he warned that “certain countries are explicitly expressing self-centered nationalism and modernizing their nuclear arsenals.”

They were “rekindling tensions that had eased with the end of the Cold War,” he added.

He urged the abolition of nuclear weapons, in a year when President Donald Trump pledged to increase the US nuclear arsenal.

“If the human family forgets history or stops confronting it, we could again commit a terrible error. That is precisely why we must continue talking about Hiroshima,” Matsui said.

“Efforts to eliminate nuclear weapons must continue,” he added.