Key Facts: US halts all Afghan immigration requests indefinitely after two National Guard soldiers shot near White House. Suspect from Afghanistan entered in 2021; President Trump labels it "an act of terror." USCIS tweet: Processing stopped for security review of vetting protocols. Move targets Afghans who entered under Biden; safety of Americans is top priority, says USCIS. "The protection and safety of our homeland remains our singular focus," per USCIS statement.​ Imagine