Marusa Bradac University of Ljubljana, Dept. of Physics Gregor Rihtarsic University of Ljubljana, Dept. of Physics Marcin Sawicki Saint Mary's University Yoshihisa Asada University of Toronto Douglas Clowe Ohio University Guillaume Desprez Kapteyn Astronomical Institute Anthony Hernan Gonzalez University of Florida Anishya Harshan University of Cambridge, Kavli Institute for Cosmology Christine Jones Smithsonian Institution Astrophysical Observatory Stacy Kim Mount Holyoke College Brian Lemaux NOIRLab - Gemini North (HI) Nicholas Martis University of Ljubljana, Dept. of Physics Lamiya Mowla Wellesley College Annika Peter The Ohio State University Andrew Robertson Carnegie Institution of Washington Tim Schrabback University of Innsbruck Chris J. Willott NRC Herzberg Institute of Astrophysics