The tallest building in Kentucky's capital city came crashing down in a controlled implosion on Sunday, delighting onlookers who then quickly scurried away to avoid the dust cloud that billowed overhead. Demolition of the 28-story Capital Plaza Tower will make way for a new modern five-story office building and a 1,100-space parking garage. The tower opened in 1972 as a state office building and closed in 2016.