. >> the authorities do deliver water to some affected but without the help of volunteers like donna johnson, it would be far too little for many families. some days, donna is on the road until late evening. the beltrans are one of the families she regularly supplies with fresh water. but ultimately help can come only from above, in the form of rain. they pray for it every night, like everyone in the valley. and that's all we have time for on this edition of global 3000. for more facts and analysis please check out our website. and remember -- we'll be back next week with our special program on global migration. until then, thanks for watching and bye bye. steves: we're in rothenburg, germany's ultimate walled city. in the middle ages, when frankfurt and munich were just wide spots on the road, rothenburg was one of germany's largest cities, with a whopping population of 6,000. today, even with its crowds and overpriced souvenirs, i love this place. during rothenburg's heyday -- that was about 1200 to 1400 -- it was the intersection of two great trading routes -- prague to paris and hamburg