A small army of workers is labouring to replace the estimated 200 thousand square meters (50 acres) of windows shattered by the shock wave from a meteor that exploded over Russia's Chelyabinsk region.
   
The astonishing Friday morning event blew out windows in more than four thousand buildings in the region, mostly in the capital city of the same name and injured some 12 hundred people, largely with cuts from the flying glass.
   
Fifty of them remain hospitalized, but their injuries are reported to be not life-threatening.
   
Regional governor Mikhail Yurevich on Saturday said damage from the explosion is estimated at 1 billion rubles ($33 million).