sentences:  The two governments agreed to exchange empty railcars (there were some empty Turkish cars left at the Armenian Akhuryan Station, and some Armenian ones at the Turkish Doğukapı), which was done on 11 July.Since then, no train has crossed the border.The Gyumri-Tbilisi section is part of the Yerevan-Tbilisi mainline, and is Armenia's only functioning rail connection to the outside world, as Armenia's borders with Turkey and Azerbaijan are closed, and the direct Armenia-Iran rail link is still on the drawing board.