Decades ago, the aspiration to build a kilometer-scale neutrino detector at the South Pole seemed farfetched; today, we celebrate the 5-year anniversary of this incredible achievement. Shortly after 6 pm New Zealand time on December 18, 2010, the final sensor was lowered into the ice. This completed the decade-long construction effort that started with the design and fabrication of detector systems and concluded with the installation of the final string of sensors.