Nuclear impasses with Iran and North Korea are the dominant issues for Secretary of State Hillary Rodham Clinton on her trip to Europe and Asia, which begins with a stopover in Germany to commemorate the 20th anniversary of the Berlin Wall's fall.
Developments in both stalemates are expected in the coming days with international patience running out over Iran's refusal to come clean about its suspected nuclear program and North Korea's refusal to return to stalled disarmament talks.
As Clinton prepared to depart early Sunday for Berlin, U.S. officials said they anticipated that the U.N.'s nuclear watchdog soon would give up hope that Iran would accept a confidence-building deal under which it would ship uranium abroad for further enrichment. That would set the stage for consideration of new U.N. Security Council penalties against Tehran.
In addition, the officials said the U.S. is nearing an announcement that it will send a special envoy to North Korea in a bid to get the North to resume the negotiations, known as the six-party talks. The envoy, Stephen Bosworth, has been invited by the North Koreans, but the Obama administration has not yet accepted.
The centerpiece of Clinton's two days in Berlin will be celebrations marking the anniversary of the Nov. 9, 1989, opening of the wall, the symbolic end of the Cold War. But behind the scenes, in meetings with German and other visiting foreign officials, the Iran question looms.
The administration is seeking support for fresh penalties against Iran. In particular, the U.S. is hoping for help from Russia, which along with China, has in the past resisted and is giving mixed signals about whether it will back them if the uranium transfer proposal is rejected.
Clinton will be at events with German Chancellor Angela Merkel, Russian President Dmitry Medvedev, French President Nicolas Sarkozy and British Prime Minister Gordon Brown, all of whose countries are involved in the Iran talks. U.S. officials said Iran will be a prime topic of conversation.
"This is a pivotal moment for Iran, and we urge Iran to accept the agreement as proposed," Clinton told reporters in Washington last week after meeting with German Foreign Minister Guido Westerwelle. "We will not alter it and we will not wait forever."
The proposal would see Iran send 1.2 tons of low-enriched uranium -- around 70 percent of its stockpile -- for reprocessing in Russia in one batch by the end of the year as a way to ease concerns that the material would be used for a bomb -- something Iran denies.