The creatures, called "prawns" as a derogatory reference to the sea creature which they resemble, are housed in a government camp. The alien race's true name is never learned; they are primarily referred to as "prawns" or, more rarely, "non-humans". Overcrowding and militarization eventually turn the area into a slum known as District 9. A massive black market is set up between the aliens and a group of Nigerians primarily led by Mumbo, a paralyzed warlord. In addition to inter-species prostitution, the Nigerians exchange canned cat food for alien weapons, of which the cat food has a similar effect to catnip on the aliens.The movie takes place in 2010. Patience over the alien situation has run out and control over them has been contracted to Multi-National United (MNU), a private company that shows little regard for the aliens' welfare. MNU is interested in using the aliens' advanced weaponry, but its integration with alien biology makes it useless for humans.
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