ISTANBUL   The interest of Russian and US businesses in joint projects mark the beginning of restoring bilateral ties, a Kremlin official said on Monday. In an interview with the daily Izvestia newspaper, Kirill Dmitriev, Moscow’s special envoy for foreign investment and economic cooperation, said Russia began talks with the US on the subject of rare earth metals projects. According to Dmitriev, some companies have already shown interest in the projects, but gave no further details. “Some of