Three Central Asian countries sign a border deal on the Fergana Valley, a long-disputed region that has ignited bloody clashes, and pledge "eternal friendship". The deal -- signed by presidents Emomali Rakhmon of Tajikistan, Uzbekistan's Shavkat Mirziyoyev and Kyrgyzstan's Sadyr Japarov -- formalises the point where their countries' borders meet in the mountainous valley. The densely populated region has been the scene of numerous conflicts -- mainly for control of water that is running out in a region badly hit by climate change. Also at the tripartite summit in Tajikistan, the Tajik and Kyrgyz leaders inaugurate a section of a joint high-voltage line to supply Pakistan and Afghanistan with energy produced by Central Asian hydroelectric power stations. IMAGES AND SOUNDBITES