Jason Stumpff’s paper showing how kinesins control the movement of chromosomes on the mitotic spindle is featured on the cover of the May 15 issue of Developmental Cell. Jason, a former postdoctoral fellow in the Wordeman Lab, is now an Assistant Professor in the Physiology and Biophysics Department at the University of Vermont and is the primary and co-corresponding author on the paper. Linda Wordeman and PBIO Research Technologist Mike Wagenbach performed the TIRF analysis with live microtubules using a DeltaVision deconvolution microscope that has been custom outfitted for TIRF microscopy. The light paths and Ultimate focus option on the microscope were designed by Jeremy Cooper (former PBIO graduate student and presently a Senior Research Engineer at Applied Precision, GE Healthcare, Issaquah, WA). Andrew Franck (a graduate student in Chip Asbury’s lab) assisted with the analysis and quantification of the movies.