After nearly 15 years of hard work, the European Southern Observatory (ESO) Very Large Telescope (VLT) in Cerro Paranal, Chile, is finally operational. The fourth and final 8.2-m (315-in.) unit telescope, YEPUN (right, front) successfully achieved first light in September. By 2003, the ESO plans to combine the four large independent telescopes with three dedicated 1.8-m auxiliary telescopes that will move on rails to form the VLT Interferometer to achieve unprecedented milli-arc-sec (0.001-in.) angular resolution for wavelengths from 300 nm to 25 µm.