Texas Governor's mansion was an impregnable stronghold, yet it burned down due to 'arson' :

http://digg.com/world_news/Suspicion_Surro..._Mansion_Fire_2

Impregnable? This isn't Ft. Knox we're talking about here. The building was undergoing remodeling at the time. It may very well be arson, and even potentially someone's misguided political statement. But please don't read too much into this!

I agree its most likely a crack head with no idea what they were doing.there was only one guard on duty there also.Its a big area in Austin to of watched over by one guy. Now the contractor is really got at full time job?