Northrop Grumman interview questions

Virtual initial interview panel via Teams followed by on-site in-person interview panel. Usually peers and an HR rep to ask "how do you handle difficult people, poor behavior etc." Round robin behaviorial based questions based on a script so each applicant answers the same questions.

I had a first phone interview with 2 technical managers for the position I applied for. It went great, they asked great questions and overall I had a good impression of them and the team. A 3rd manager(?) over this position couldn't make the phone interview and reached out to me separately to set up a 1:1 phone call. He accepted a time/date to call, and then flaked without notice. He reached out the following day trying to reschedule, but I declined.