Metropolitan Airports Commission interview questions

Brought into the airport for a case and group interview. Had 50 minutes to assess a doctored retail space and write up a business plan as to why it wasn't doing well. Then interviewed with a group of 5 including HR, the Assistant Director of BD, an attorney, architect and one other man who managed the airport. Everyone received a thank you note. I was disappointed to not get the job and when I wrote a note to HR requesting feedback, then followed up with phone call, nobody responded, even to acknowledge the request. I did get a very negative vibe from the HR person. The others seemed nicer.