I'll give you a question, please answer with step-by-step reasoning process. Where are you if your bieifcase is going through an x-ray machine?
Options:
- luggage store
- courtroom
- airport
- office building
- hand

Show your work and conclude with the exact phrasing "Therefore, the final answer is [answer]." where [answer] is just the final number or expression that solves the problem.
user
Briefcases are found in airports. Airports perform scanning of briefcases.
The answer: airport.