The Gatekeeper 1st Open Call closed on February 28th, 2021. In total, 114 proposals were received, addressing the 6 challenges, with applicants from 23 countries across the world. were submitted through the Online platform. More detailed information about the 1st Open Call are published on the project web site. We warmly thank all applicants for their interest and participation in our 1st Open Call, which make it a success of participation!