Seats of the judges at the International Court of Justice, or World Court, in The Hague, Netherlands.

Peter Dejong/AP

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Peter Dejong/AP

On Monday, President Trump threatened to destroy civilian infrastructure across Iran, including the country’s desalination plants, vital for drinking water in the arid Gulf. Kuwait authorities said Iran had attacked one of their desalination plants earlier that day. Deliberately attacking essential civilian infrastructure is a war crime under international law. Yet both sides have hit civilian infrastructure in this conflict. We ask a legal expert about accountability in war.