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IMAGINE being locked away in a cage for 30 years and injected with viruses. Now imagine you're a chimpanzee.
Life looks pretty grim, right?
But there's light at the end of this tunnel for one group of Austrian laboratory chimps.
They have just been released from their oppressive conditions and got to see the sun for the first time in their lives.
Footage shows the animals hugging each other before taking their first steps outside.
Watch the chimps react to their surroundings: