We explore the largest infrastructure project in the history of the Baltic states - a new high-speed line connecting Estonia, Latvia and Lithuania with their Western allies.The project is supposed to be an economic boost to the region, and yet getting it on track hasn't been straightforward. We speak to those in charge of the project, and to businesses in the cities en-route.Produced and presented by Lisa Louis.(Image: The partly-built Rail Baltica Riga central hub in Riga, Latvia, in June 2024. Credit: Andrey Rudakov/Bloomberg via Getty Images)