Nuclear shipment alarms Belgrade Serbia has flown 6,000 uranium rods - enough to make two nuclear bombs - back to Russia, in high-security operation that alarmed residents in the capital Belgrade. Helicopters hovered over the city and special police in gas masks guarded the route from the Vincha nuclear research institute to a local airport, as the transportation operation began early on Thursday. The Serbian Science Minister, Dragan Domazet, said city residents were in no danger, stressing that the operation had to be kept secret because of a risk of terrorist attack. "You always have to foresee everything, like...