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Iran's foreign minister Wednesday told world powers to "seize the moment" and drop "excessive demands" as marathon high-stakes nuclear talks headed into another long bruising night of hard bargaining. French Foreign Minister Laurent Fabius arrived back in Switzerland to rejoin the negotiations saying the talks were in the final stretch. Fabius was re-joining US Secretary of State John Kerry and their counterparts from Germany and Britain. "Iran has shown its readiness to engage with dignity and it's time for our negotiating partners to seize the moment," Mohammad Javad Zarif told reporters late on a seventh day of talks in Lausanne.