Sixty-four people missing after a disaster at a Russia's largest hydro-electric dam are most likely dead, the dam's owner has said...The number of confirmed deaths at the facility in Siberia is 12 so far..."[T]he search continues," a spokesman for state-run hydro-electricity company RusHydro said. A rescue operation was launched after a turbine room flooded at the Sayano-Shushenskaya dam early on Monday...The accident shut down the power station, which supplies several major aluminum plants, and outages were reported throughout the region... [T]he accident left a large oil slick floating downriver...