Workers remove stones next to a welcoming board for the inaugural Formula One Grand Prix at the Bahrain International Circuit near the capital of Manama in this April 1, 2004, file photo. Bahrain Grand Prix organisers cancelled the opening race of the Formula One season on February 21, 2011, due to unrest in the country. REUTERS/Stefano Rellandini (Bahrain – Tags: SPORT MOTOR RACING)