But he says important gaps still stand in the way of an agreement.
Speaking after a week of nuclear talks with Iran, Kerry said Saturday that the U.S. wasn't rushing for an agreement even as a March 31 deadline looms for a framework agreement.
He said fundamental decisions needed to be made and stressed that world powers and Iran have an opportunity right now for a diplomatic solution.
Kerry was departing later Saturday for London to meet with European allies, before returning to Washington.
Talks with Iran resume next week.

Kerry (AP file photo)
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