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By John Irish and Louis Charbonneau VIENNA (Reuters) - A year and half of nuclear talks between Iran and major powers were creeping towards the finish line on Friday as negotiators wrestled with sticking points including questions about Tehran's past atomic research. Iran is in talks with the United States and five other powers - Britain, China, France, Germany and Russia - on an agreement to curtail its nuclear program in exchange for relief from economic sanctions. "We are coming to the end," said a senior Western diplomat, who added there was no plan to carry on for long past next Tuesday.
The Solar Impulse 2 aircraft completed an historic flight in its quest to circle the globe without consuming a drop of fuel, touching down gracefully in Hawaii on Friday after the most arduous leg of its journey. The sun-powered plane, piloted by veteran Swiss aviator Andre Borschberg, took five days to make the historic voyage from Japan to Hawaii and landed shortly after dawn at Kalaeloa Airport on the main Hawaiian island of Oahu. "Just landed in #Hawaii with @solarimpulse! For @bertrandpiccard and I, it's a dream coming true," Borschberg tweeted triumphantly upon after completing the most dangerous leg of the around-the-world journey.