washington group republican democratic u.s. senators introduce legislation wednesday would provide additional 2,500 visa afghans assist u.s. force work interpreters support function often risk live u.s. state department say last week would soon run visa special immigrant visa siv program design help bring unite state work government decade half u.s. force engage country u.s. embassy kabul stop schedule interview applicants seek visa program bill introduce republican senators john mccain chairman senate arm service committee thom tillis democrats jack reed committee top democrat jeanne shaheen tillis shaheen also members panel four senators lead efforts senate extend afghan siv program last year legislation would ensure continuation vital special immigrant visa program send clear message america turn back great personal risk stand us fight terror mccain say statement national defense authorization act pass late last year add 1,500 visa program tighten requirements eligibility shaheen office say 10,000 applicants still process obtain visa afghan visa announcement come u.s. officials prepare implement president donald trump executive order effective week temporarily ban admission refugees travelers six muslim-majority countries afghanistan one six members congress resist expand siv program concern militants could use enter unite state supporters program dismiss concern note applicants subject intense screen u.s. lawmakers seek visa afghans help u.s. force