Yesterday, Czechs celebrated the 106th anniversary of the founding of Czechoslovakia in a nationwide state holiday. But despite the historically close links between Czechs and Slovaks, since Robert Fico's return as Slovakia's prime minister in 2023, there has been a distinct cooling in relations between the former sister states. I spoke with Kristína Chlebáková, Project Manager at the EUROPEUM Institute for Foreign Policy, to reflect on Czech-Slovak relations and explore what might lie ahead.