Hollywood actor Michael Douglas, a U.N. "messenger for peace," wants President Barack Obama to issue a strong message against nuclear weapons when he visits Hiroshima in Japan later this month.

Douglas told reporters at the United Nations in Geneva, where nuclear negotiations have been stuck for 20 years, that the nuclear danger was greater than during the Cold War, largely due to a "huge escalation" in U.S.-Russia tensions and increasing recklessness in their close-quarter contacts.

"There's this kind of crazy tension between U.S. and Russia. We have our issues but I don't quite see that all of this posturing is helping anybody," he said.