Legal expert says targeting civilian sites would be ‘collective punishment’, which is prohibited under laws of war. US President Donald Trump says he is in talks with a 'new' government in Iran [Elizabeth Frantz/Reuters] Donald Trump has renewed his threat to “blow up” a range of civilian infrastructure in Iran, including all of the country’s desalination plants, in a move that would threaten the water source for millions of people and that experts say would be illegal. The United States...