Croatia switched to the euro and entered Europe’s borderless zone as Prime Minister Andrej Plenkovic called a historic moment for his country. The Balkan nation bid farewell to its kuna currency and became the 20th member of the Eurozone. It is now the 27th nation in the passport-free Schengen zone. It is the world’s largest zone which enables more than 400 million people to move freely around its members. The country of 3.9 million people joined the European Union in 2013.