However this is very rare and very unusual to do so. Normally it is where experiments have been done on a being and it is beyond our current ability to remedy the experiment that is being run on them. Or it is a long time to take to repair the damage. There is a young lady on the base that was abducted some time ago who is currently undergoing treatments for various problems that were created by her abductors. Also when boarding we check as I stated for contraband material which may be surprising what contraband materials we look for.
Water is one, salt is another one.
Gold obviously, illegal narcotics by your planets laws. These are just four items that we look for. There are more. Well that s about all I have.