2018 Global City Teams Challenge (GCTC) will be co-hosted by NIST and U.S. Department of Homeland Security Science and Technology Directorate (DHS S&T) as the Smart and Secure Cities and Communities Challenge (SC3). GCTC-SC3 kickoff conference will bring together hundreds of municipal governments and technology innovators around the world with the goal to establish teams to address shared issues faced by cities and communities.