Aerospace Testing Alliance interview questions

Interview went fine , it was the after that was not good. Was told to wait for them to do the criminal background check and I would be contacted. I was given Benefits paperwork , so I thought they were serious. Most places wont do a security check unless they are serious. but they only wanted enough candidates to assure filling the position. I was told at the seven week time , that there were two ahead of me and if one did not pass security check I would be next.