We are conducting a systematic lensing survey of X-ray luminous galaxy
clusters at z~0.2 using the Hubble Space Telescope and large ground-based
telescopes. We summarize initial results from our survey, including a
measurement of the inner slope of the mass profile of A383, and a search for
gravitationally lensed Extremely Red Objects.Comment: 4 pages, 2 figures. To appear in "A New Era in Cosmology" (ASP
Conference Proceedings), eds. T. Shanks and N. Metcalf
