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Colombia sterilizing hippos descended from pets of kingpin Pablo Escobar

02:30

In the 1980s, known drug kingpin Pablo Escobar brought a group of hippopotamuses from Africa to live on his private Colombian estate but after his death the mammals were set free. Natives say the hippos and their descendants have multiplied in the decades since. NBC News' Valerie Castro shares how the country plans to get the population under control.