The suspect in the shooting of two National Guard members in Washington, D.C., had worked with an elite counterterrorism unit operated by the CIA, according to a veterans group that supports the United States military's former Afghan allies—but little is known about the group or its work.

Afghan national Rahmanullah Lakanwal, 29, was arrested in connection with the killing of Sarah Beckstrom, 20, and the wounding of Staff Sgt. Andrew Wolfe, 24, two West Virginia Guardsmen who were posted to the city as part of President Donald Trump’s crackdown on crime .

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Lakanwal was one of thousands of Afghans who worked alongside the U.S. military during the nearly 20-year war against the Taliban. Not everyone w

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