Georgia Tech Research Institute Senior Research Engineer interview questions

During the interview process immediately after exchanging greetings, the recruiter asked that GTRI requires citizenship for most of the position and if I am US citizen. This question kind of threw me off guard, as I am a veteran who served in the Army and National Guard and clearly stated in my resume and several other forms that I filled out prior to the interview. Beside the citizenship question the recruiter seems to be interested in knowing what is I am good at and what I do currently. Within minutes after the interview was completed I received an email stating that I am not moving forward. Despite the immediacy of the email, I was not surprised by the rejection as I got the sense that the interview was not going well right from the beginning.

None. I breezed through the interview.