Caterpillar interview questions

I applied online and received an invitation for onsite interview for a research position in engine department. Interview was scheduled a week from the day i received the email. The process of getting tickets was easy and straight forward. They have a department to take care of that. I arrived in Peoria the day before the interview took a cab to the hotel. Had a nice meal and rested the night. The next morning i took a cab to the interview location and meet with the guide who accompanied to get the drug test done. After which i proceeded to go to the interview room. The room was average, with a conference table and chairs, pretty standard. The manager arrived first followed the two other interviewers. The interview process was fairly straight forward, they used target selection. After the interview, i went to eat lunch, the guide had a conference call to attend so i had to go out eat alone. After which i was taken on a brief tour of campus. They never really sent me a rejection letter, it has been more than 5 weeks since the interview. I am pretty sure the position is filled.