Searching for ET.

Avi Loeb, The Chair of Harvard University's Astronomy Department, delves into the search for extraterrestrial life.

GZERO World with Ian Bremmer: watch now

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How to solve Colombia's cocaine problem

GZERO World Clips

The Graphic Truth: Sending money home

Closing the Gap
Live from the UN General Assembly: Rescuing a World in Crisis | Global Stage

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