After talking to the Lockheed Martin recruiters at my university's career fair, I received an on-campus interview. The interview consisted of your normal behavior questions, and talking about your previous work/intern experiences. After about two weeks, I was invited to the next round of interviews at their Crystal City, VA location. That interview consisted of three individual interviews that lasted about 15-20 minutes each. Overall the interview process was very laid back, and enjoyable. They were more concerned about your skill sets and what you could bring to the company, rather than if you could be boxed into a certain category like most behavior interviews do.