Failure to Launch

As last I knew (it's certainly not like I'm some authority), one Buran had been destroyed in a hangar collapse and two more were still around in various bits and pieces.

The Buran was probably a better design than the Shuttle -- not too surprising since it was basically the exact same design brought along 7-8 years later -- but had it gone into regular flight service, due to the fact it shared the same lateral-stack design as the Shuttle, at some point they would almost certainly have had a Columbia-type disaster with ice chunks falling off the external tanks and hitting the thermal tiles.

 

I'm not certain, but I think the hangar that collapsed is the same giant building that I saw from a distance. There is a Buran model in Gorky Park in Moscow.