During the last morning of the conference, a one-hour open discussion allowed the participants to debate some of the "hot" topics presented all along the meeting as well as on some of the key issues in the field mostly related with the work Prof. Michael J. Thompson studied during his carrier. The discussion covered theory and methods, current and future modeling efforts, observations, and future instrumentation. At the end, Dr. Robin Thompson discussed about the use of inversion methods in his current research, of particular interest these days, about the control of infectious disease outbreaks.