I will describe the DSA-2000 project, a proposed world-leading radio survey telescope and multi-messenger discovery engine. The array will consist of 2000 × 5m dishes instantaneously covering the 0.7 - 2 GHz frequency range, spanning an area of 19 km × 15 km in Nevada. In an initial five-year survey, the DSA-2000 will image ~30,000 deg^2 repeatedly over sixteen epochs, producing a deep 20cm sky image at 3.3 arcsecond spatial resolution. Fundamental questions surrounding the baryon cycle in galaxies, the formation of stars over cosmic time, and the influence of active SMBHs on galaxies, will be addressed by detecting over a billion star-forming galaxies and active SMBHs, and by observing the neutral-hydrogen kinematics and contents of several million galaxies. The array will revolutionize the field of radio transients, detecting >10,000 FRBs and >1 million slow transients, with sub-arcsecond localization for host galaxy identification. The DSA-2000 will be also be a leading instrument for the discovery and characterization of the electromagnetic counterparts to neutron-star mergers found by ground-based GW detectors. The DSA-2000 is enabled by two breakthrough technologies, i) a low-cost antenna with an ambient temperature receiver and ii) a new generation of digital back-end known as a radio camera, that outputs image data in real time. I will also discuss our recent efforts towards building an HI radio camera for the DSA-110, the DSA-2000 precursor.