A new round of international talks on Iran's nuclear program is under way in Kazakhstan, where the U.S., Britain, France, China, Russia and Germany are asking Iran to give up any thought of building a nuclear weapon in exchange for relief from sanctions.
Western leaders do not predict a breakthrough, but they say small steps could be taken that would increase confidence on both sides.
Still, it's hard to imagine how such negotiations could proceed with lower expectations for progress.
Talks between the U.S., its allies and Iran about the Persian giant's nuclear ambitions are due to begin Tuesday in Almaty, Kazakhstan. As the time draws near, we're seeing stories about how each side will approach the discussions.
North Korea's latest nuclear weapons test is much more powerful than the previous two, according to estimates made by instruments that measure seismic waves from the blast. It's about the size of the bomb that devastated Hiroshima in World War II.
But it's not so easy to verify the claim that the nuclear explosive has also been miniaturized. That's a critical claim because a small warhead would be essential if the rogue regime chose to threaten the United States with a nuclear-tipped missile.
Big bombs are easier to make, but they aren't all that useful as a threat.