question:  Why is the qualification interviewer under a glass dome?
context: THE PERFECTIONISTS By ARNOLD CASTLE ILLUSTRATED by SUMMERS Is there something wrong with you? Frank Pembroke sat behind the desk of his shabby little office over Lemark's Liquors in downtown Los Angeles and waited for his first customer. Therefore, it was with a mingled sense of excitement and satisfaction that he greeted the tall, dark, smooth-faced figure that came up the stairs and into the office shortly before noon. Opening the desk drawer, which was almost empty, Pembroke removed an automatic pistol fitted with a silencer. The series of events leading up to Pembroke's present occupation had commenced on a dismal, overcast evening in the South Pacific a year earlier. Standing on the forward deck, Pembroke was one of the first to perceive the peculiar odor and to spot the immense gray hulk wallowing in the murky distance. Pembroke came as close to being a professional adventurer as one can in these days of regimented travel, organized peril, and political restriction. Lacking such loyalties, Pembroke adapted quickly to the situation in which he found himself when he regained consciousness. His situation could have been any small western American seacoast city. One in particular, an attractive woman of about thirty, tossed back her long, chestnut locks and gazed up intently at Pembroke as he passed. "You're not casual enough, for one thing," said Pembroke, deciding to play along with her for the moment. Also you're a bit knock-kneed, not that it matters. Pembroke watched with lifted eyebrows as the clerk whisked the bizarre statuette underneath the counter. "Don't try to go so fast and you won't fall down," suggested Pembroke. "Incidentally, just where are we, anyway? But as he left the shop he began checking off every west coast state, city, town, and inlet. None, to the best of his knowledge, was called Puerto Pacifico. Pembroke watched him hurry off to service a car with a sense of having been given the runaround. "All cargo ships, I'll bet. No passengers," said Pembroke.
output:  The interviewer is an alien, and it does not breathe oxygen.
options:  The interviewer is protecting themself from aliens.  The glass dome is to protect the interviewer from human contact.  The interviewer has a compromised immune system.  The interviewer is an alien, and it does not breathe oxygen.