National Geographic Investigates - Invaders: Colombia's Hippos

Hippos are invading Colombia, thanks to Escobar, and the government must act. Hippos are invading Colombia, thanks to Escobar, and the government must act. Hippos are invading Colombia, thanks to Escobar, and the government must act. Hippos are invading Colombia, thanks to Escobar, and the government must act.