After Wilson stepped down in 1978 to protest the lack of funding for the lab, Leon M. Lederman took on the job. It was under his guidance that the original accelerator was replaced with the Tevatron accelerator. The new accelerator was capable of colliding proton and an antiproton at a combined energy of 1.96 TeV. Lederman stepped down in 1988 and remains Director Emeritus. The on-site science education center (which serves students and the general public) was named in his honor.