TALLINN - The mayors of Tallinn and Helsinki want to launch a feasibility study into building an undersea rail tunnel between the two capitals. Edgar Savisaar met with Helsinki Lord Mayor Jussi Pajunen in Finland on June 19 and agreed to launch the feasibility study. However it seems highly unlikely the project would ever to proceed. Such a tunnel would need to stretch over 80km. The longest undersea tunnel in the world is the English Channel Tunnel, which runs for 50km.