Our crowd dynamics and evacuation research originated in 2005 when Harri Ehtamo, Simo Heliövaara, Simo Hostikka, and Timo Korhonen started the collaboration between the Department of Mathematics and Systems Analysis at Aalto University and the Fire Safety Research group at VTT Technical Research Centre of Finland. Together with VTT, we have been developing the widely-used fire and crowd dynamics simulator FDS and an evacuation simulation module Evac of it (Korhonen and Hostikka, Technical Report VTT, 2009). FDS+Evac has been used, e.g., in the fire safety design of Helsinki Music Centre. The research collaboration has also resulted in three Ph.D. theses during the years 2005-2021.