In its first month of operation, the LSST will see more of the Universe than all previous telescopes combined. Its rapid-fire, 3-billion pixel digital camera will open a movie-like window on objects that change or move; its superb images will enable mapping the cosmos in 3D as never before. Surveying the entire sky every few days, LSST will provide data in real time to both astronomers and the public. For the first time, everyone can directly participate in our journey of cosmic discovery.