The Department of Homeland Security urges Afghans who are losing legal status to apply for asylum
Some special immigrant visa holders may have to leave the United States
Refugees say they face death if they go home to Taliban rule
The Central American nation looks to El Salvador for inspiration
The Trump administration restores limits on this frequently used immigration parole
Visa caps and policy hurdles stall U.S. resettlement efforts
Some of those waiting helped U.S. forces; others seek refuge from the Taliban
