U.S. Marines

Increasing civilian deaths in stepped-up U.S. airstrikes and operations by Afghan forces highlight the conundrum the U.S. military and its Afghan allies face, 18 years into the war: How to hunt down their Islamic State group and Taliban enemies, while keeping civilians safe and on their side.

As some 800 Marines gathered in formation at Camp Pendleton in California, 16 people were pulled out and put under arrest. An NCIS spokesperson said a total of 18 Marines have been apprehended.