In Memoriam In memory of scientists who served the field of mass spectrometry and the WBMSDG. Sanford P. Markey, Ph.D. 1942-2022. Alfred L. Yergey, Ph.D. 1941-2018. Joseph Campana, Ph.D. 1952-2014. Robert J. Cotter, Ph.D. 1943-2012.