Northrop Grumman interview questions

Applied online after meeting someone that worked there. Received an email 2 months later to schedule an interview which took place 2 weeks later. I was scheduled to meet with several different people and was told to set 3 hours aside for the interviews. I first met with two hiring managers that were not on my original schedule because they said that the people that I was going to be interviewed by were busy. After speaking with them for about an hour about my previous experience and discussing more about the program, they said that the people that were after them were running a few minutes late. I waited in the conference room for about 15 minutes before someone came in and told me that the interviewers couldn't be found and they needed the conference room. I emailed the recruiter when I got out of there, and 2 days later received an automated message saying that they had decided to pursue other candidates. I just wish they hadn't wasted my time.