RFERL:

Iran will top the agenda for U.S. Secretary of State Rex Tillerson as he heads to Europe next week for meetings with allies, a U.S. official said on January 19.

Tillerson's trip comes amid behind-the-scenes negotiations over the fate of the landmark agreement to curb Iran's nuclear program in exchange for easing crippling international sanctions targeting Tehran.

Earlier this month, U.S. President Donald Trump announced that he was prolonging U.S. sanctions imposed earlier against Iran. But Trump also said he wanted to work with European allies and Congress to fix what he called "disastrous flaws" in the 2015 Iran deal signed under his predecessor, Barack Obama.

Trump warned that Washington would withdraw from the deal if it is not strengthened within 120 days.

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