What WAS the mysterious flash that lit up Russian sky for 11 seconds, 'turning night into day'? Government's refusal to say sparks theories of missile blast... or UFOs

A huge flash in the night sky over Russia is raising suspicions after the authorities refuse to comment on its cause. The eruption lit up the sky near Yekaterinburg for 11 seconds in what appeared to a major aerial explosion. The strange light was not accompanied by any sound, according to eyewitnesses, although Russian authorities are refusing to comment on the event. (Daily Mail)