Theodore S. Rappaport founded NYU WIRELESS, a multidisciplinary research center, and the wireless research centers at the University of Texas Austin and Virginia Tech. Professor Rappaport is a member of the National Academy of Engineering, the Wireless Hall of Fame, and a fellow of the National Academy of Inventors. Kate A. Remley is the Leader of the Metrology for Wireless Systems Project at the National Institute of Standards and Technology. Here Dr Remley specialises in the development of calibrated measurements for microwave and millimeter-wave wireless systems and standardized over-the-air test methods for the wireless industry. Camillo Gentile is leading the Radio Access and Propagation Metrology Group and the NextG Channel Measurement and Modeling Project at the National Institute of Standards and Technology. Here Dr. Gentile prototypes novel radio-frequency channel measurement and modeling techniques for the millimeter-wave and sub-Terahertz bands. Andreas F. Molisch is the Solomon Golomb- Andrew and Erna Viterbi Chair Professor at the University of Southern California. He is a Fellow of the National Academy of Inventors, AAAS, IEEE, IET, Member of the Austrian Academy of Sciences, and recipient of numerous awards. Alenka Zajić is Ken Byres Professor in the School of ECE at the Georgia Tech. She is the recipient of many awards including NSF CAREER Award, multiple Best Paper Awards, and Neal Shepherd Memorial Best Propagation Paper Award. Her research interests span applied electromagnetics, wireless communications, and computer systems.