After an Afghan national was charged with shooting two National Guard members, veterans who worked closely with Afghan refugees who were once frontline allies are scrambling to respond to the blowback.

The U.S. invaded Afghanistan on October 7, 2001, in response to the 9/11 attacks a month earlier. The U.S. presence in Afghanistan then continued under four presidents.

An Afghan national who fought with a CIA-backed paramilitary group against the Taliban is facing charges for shooting two National Guard members on US soil.

The shooting of two National Guards members has prompted the Trump administration to crack down on Afghans who entered the U.S. after assisting American forces during the war.

The Battle of Takur Ghar began three days into Operation Anaconda—an attempt by thousands of U.S. and allied troops to encircle Al Qaeda and Taliban forces in Afghanistan’s Shah-i-Kot Valley in March 2002.

Investigators are probing whether the Afghan suspect in the shooting two National Guard troops was blackmailed into carrying out the attack by the Taliban.

KABUL, Afghanistan -- Afghanistan’s Taliban authorities carried out a public execution at a stadium in the eastern city of Khost on Tuesday, putting to death a man who the country’s Supreme Court said had killed 13 members of a family, including several children, earlier this year.

Officials are reportedly probing whether the National Guard shooting suspect was among Afghans who have faced retribution for previously collaborating with U.S. forces in Afghanistan