Video: US builiding worth $1 demolished The US city of Flint's tallest building, the 19-story Genesee Towers, was reduced to rubble on Sunday. Crowds of people gathered to watch the implosion which transformed the 45-year-old building into some 30,000 tons of broken concrete in a matter of seconds. Uptown Reinvestment bought the building, that had been empty for years, from the city for just $1 (£0.64). Plans are to transform the site into a family-friendly plaza with a science theme as part of a larger downtown redevelopment.