great personal risk and expense. on sunday four u.s. military plants transported military planes from egypt to cairo and cnn s ivan watson has the latest from the libyan border and the city of djerba. reporter: people keep streaming across the border here in tunesia. more than 100,000 people have fled in the last two weeks and will keep coming. they are met by tunisian volunteers who hand out food, who hand out water, and this is important because these refugees are hungry and thirsty and frightened. many of them tell us that they haven t had any access to food and water for days and they have been charged exorbitant prices for transport to try to flee the fighting in libya. i m so very hungry. reporter: why? haven t eaten. reporter: no food for four days. no sleeping.