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US Army study: Iraq's Mosul dam at 'higher risk' of failure

Iraq's Mosul Dam has long been branded the world's most dangerous dam, at risk of collapsing and sending water crashing over millions of people. That prospect is even greater than was previously believed after the Islamic State group captured the dam briefly in 2014, according to a new report by U.S. Army engineers.

Efforts to find a permanent solution for the dam, Iraq's biggest, are held up by political wrangling and the price tag of more than $2 billion, leaving the country dependent on stopgap measures that some experts fear will no longer be enough. Iraq's Water Resources Ministry says there is no imminent danger of collapse, despite the U.S. warnings.

The dam's core...