The head of the institute developing a sea-based version of Russia's newest strategic missile has quit following repeated failures of the weapon in testing, officials said Wednesday. Yury Solomonov, head of the Moscow Institute of Thermal Technology, was the most senior official to date to take responsibility for the string of failures of the Bulava intercontinental ballistic missile, currently in development. "After the latest unsuccessful launch of the Bulava rocket, Yury Solomonov has submitted a resignation letter," Interfax-AVN, a news agency specializing in military affairs, quoted a source in the country's space industry as saying. The source said his resignation...