Friends and foes have called Cuba many things - a progressive beacon, a quixotic underdog, an oppressive tyranny - but no one has called it lucky, until now . Mother nature, it emerged this week, appears to have blessed the island with enough oil reserves to vault it into the ranks of energy powers. The government announced there may be more than 20bn barrels of recoverable oil in offshore fields in Cuba's share of the Gulf of Mexico, more than twice the previous estimate.
