They followed up quickly and flew me out. I was asked to prepare a 1 hour presentation at the last minute, and present. The interview was interesting, and I met with many people in different areas, and felt more positive about some than others. Ultimately I did not receive an offer, which was kind of surprising to me at the time. The more I think about it, the more I understand they really were only looking for electrical engineers, which I had little to no experience in.