In reality the engines are constantly producing a stream of hot compressed air which is bleed off for various subsystems. One of these is the air conditioning systems. These cool that air and filter it so that it's clean and at a reasonable temperature for passenger comfort. The air is added to the cabin at a pretty much fixed rate and the pressure is regulated by a dump valve which dumps excess pressure overboard. There is no real recycling of air.
How do they regulate oxygen levels?
Or are those levels more or less the same as on the ground but it's the pressure that incommodes?
Questionable items with no obvious cash value simply go away. Off the plane.
It probably is the smell, the charcoal and trace chemicals that mess with swabs and dogs.
I was very confused how she would pass a bowl of unidentified ash from the airport security (we only had a backpack each). She drafted a poorly done and obviously fake death certificate. It was not campfire ash anymore, it was the remains of her father.
The people at the airport were visibly awkward, they tried to be as accommodating as they could. She flew back home with a plastic bowl of ashes from our campfire, it even had some parts of birch and branches.
Airport security was easily fooled. And the author's mom is easily fooled too, motherly instincts be damned. Would a neural net be fooled by the author's attempts? I know for sure that an automated security system would sound the alarm on my friend. I 'd like to see adversarial networks fighting each other on such premises. A son network trying to fool the mother network and vice versa ad infinitum, at least 1 billion of simulation hours in. What kind of wonders would come out