Superfluidity contributed in the oganisation of the 5G Cross-Project workshop organised in Athens on February 6-7, 2017. The workshop was focused on 6 different topics aiming at enabling collaboration among Phase 1 projects in order to create a common European view and pave the way to the standardisation of 5G system. Superfluidity was represented in the session “Overall 5G RAN design and Overall 5G architecture” by George Tsolis from CITRIX with the presentation “Superfluidity: Architecture concepts, Putting them in practice, Challenges”. In the “Security” session, Matei Popovici from UPB presented “Symnet: scalable symbolic execution for modern networks“.