Bahrain:  Formula One boss Bernie Ecclestone insists the Brazilian Grand Prix will remain at Interlagos, saying he's received assurances from the mayor of Sao Paulo that long-demanded upgrades to the circuit will take place.Ecclestone, in Sakhir on Friday for the Bahrain GP, also said F1 was "talking to quite a few countries" about being added to the calendar. Among them were Thailand, Mexico and Turkey.He said Sao Paulo Mayor Fernando Haddad wrote to guarantee the upgrades at Interlagos."We have been waiting long enough," Ecclestone said. "If Sao Paulo does what they say they are going to do, we don't need to move. They know what the deadline is. If they...
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