After such an incredible year, the whole working group was looking forward to joint activities again. Normally, the group presents interesting works, invites guests, but the global situation forced us to compress our activities and wait a little. Finally, the time had come and we were able to go into a fantastic team building event on the Tempelhofer Feld. Thanks to the great organization of Ricardo, Federico, Prof. Dewey and the whole, motivated working group! Many thanks to all!