Rewilding: How vultures could save an ecosystem

Conservation groups all over the world are bringing animals back from the brink of extinction. I meet a team in Bulgaria working with the creepiest species of them all: vultures. The idea is that they will eventually help mitigate climate change. But how exactly is that supposed to work? Reporter: Aditi Rajagopal Video Editor: Andreas Hyronimus Supervising Editor: Joanna Gottschalk