In 2006, Congress established the Special Immigrant Visa program for Afghans and Iraqis who had worked for the U.S. military and U.S. government agencies. The Department of State has done a poor job of implementing the SIV program through four administrations.

Publications about Afghan SIV Program

Coburn, Noah, "The Costs of Working with the Americans in Afghanistan: The United States' Broken Special Immigrant Visa Process", Watson Institute, Brown University, April 5, 2021, PDF, 20 pages. Read the report here.

DoS IG, Review of the Afghan Special Immigrant Visa Program, Office of Inspector General, United States Department of State, AUD-MERO-20-35, June 2020, PDF, 44 pages.
https://www.oversight.gov/sites/default/files/oig-reports/AUD-MERO-20-35.pdf

News Reports about the SIV Program

August 31, 2021. "How Trump broke the system that offers protection to Afghan allies", The Hill. A former senior official in the State Department refugee bureau during the Trump administration describes how the SIV process could have been fixed and how the Trump administration sabotaged it.