How the U.S. campaign in Iraq has escalated with a new weapon: rocket artillery

The Washington Post: Last week, close watchers of the many-sided war in Iraq and Syria learned from an apparently inadvertent Russian state television disclosure that Russia has upped the ante in its eight-week-old war in Syria, apparently adding ground-based artillery to the array of attack jets, strategic bombers, and helicopter gunships that have been pounding Islamic State terrorists and U.S.-backed rebels alike in the country.

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