The U.S. Department of Energy established in 2016 the Exascale Computing Project (ECP) -- a joint project of the DOE Office of Science (DOE-SC) and the DOE National Nuclear Security Administration (NNSA) -- that will result in a capable exascale ecosystem and prepare mission critical scientific and engineering applications to take advantage of that ecosystem. This presentation will describe the goals of the ECP, its plans for achieving them, the challenges to be overcome, and its current status, as well as what elements of the exascale ecosystem are outside of the scope of the ECP.