Actor Sean Penn gets an earful from a former co-star over his support for Venezuelan leader Hugo Chavez.

At the start of this century, clean energy was all the rage. The revolution may still be happening, but it's taking its time, reports Peter Huck.

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Michael Moore claimed he helped Venezuelan president Hugo Chavez write a UN speech over a bottle and a half of tequila.

US President Barack Obama's recent Nobel Peace Prize has generated much praise as well consternation around the world.