Commentary: Opec: An Uncertain Grip On The Spigot

In central Caracas, the usually vibrant streets are closed off and patrolled by soldiers. Military police with muzzled dogs patrol the concrete towers. No, it's not another Venezuelan military coup. Instead, the heads of state and ministers of OPEC are in town. They've been invited by Venezuela's tough-guy leader Hugo Chavez to celebrate the organization's 40th anniversary.

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