The $12 billion pipeline is set to double supplies of cheap natural gas from Russia to Germany but has been dogged by delays and drawn fierce criticism from allies.
Tuesday marks the 71st anniversary of the Universal Declaration of Human Rights.
While Iran has one of the most heavily subsidised gas prices in the world, the country is trying to get its house in order amid US sanctions.
A policeman was killed in the western city of Kermanhshah in a clash with armed "rioters", the second confirmed death since protests erupted across Iran.
Why the government's austerity measures and claims of decreasing inflation don’t sit well with regular Egyptians.
The yellow vest movement has spread to several countries around the world who are protesting similar issues.
Shouts of "Macron, resign" mingled with the tear gas near the famous Champs-Elysees avenue, the scene of the worst rioting in Paris for decades last weekend.
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