Maduro bids to revive Venezuela's 'petro' that has been blocked by the United States

President Nicolas Maduro decreed on Tuesday that airlines flying from Caracas would have to pay for fuel in Venezuela's ailing cryptocurrency "petro," which he ordered to be used more widely in the cash-strapped South American country.

Maduro used his annual speech at the governing Constituent Assembly to try to revive the notorious petro that has been blocked by the United States and branded by some risk assessment bod....