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tell them now i m alive. reporter: you re alive? yes. reporter: to save him time, we lent him our phone. okay. reporter: the phone link is vital because for these people it is by no means certain how long they ve still got to wait to get back home. alex thompson, channel 4 news on the libyan/tunisian border. there are so many tents in one border town it can be seen from satellite in space. there is a town in tunisia not far from libya. there is an urgent need for food, water and sanitation for all the people flooding across the borders into tunisia and egypt. you are watching world one. in china there is an emphasis on keeping a lid dissent. ....