Powerful Eruption Rockets Ash 65,000 Feet; Residents Warned to Take Cover

Volcano on remote Russian peninsula erupts, sending debris streaming hundreds of miles.
Giant plume threatens aviation and covers wide area in thick coat of ash.
Towns advised to stay indoors; water supplies disrupted but no deaths reported so far.
One of the most active volcanoes in a region with high geothermal activity, the peak has had 60 major eruptions in 10,000 years.