. >> ifill: kylie morris of independent television news has the latest on the tens of thousands of pakistanis in urgent need of food and medical aid after days of deadly flooding. >> woodruff: and margaret warner talks to former senator slade gorton and former c.i.a. director john mclaughlin about congressional oversight of the nation's massive intelligence community. that's all ahead on tonight's newshour. major funding for the pbs newshour has been provided by: and with the ongoing support of these institutions and foundations. and... this program was made possible by the corporation for public broadcasting. and by contributions to your pbs station from viewers like you. thank you. >> woodruff: this was a critical day in the summer of the spill in the gulf of mexico. the moment finally arrived for b.p. engineers to try shutting down the source of the oil, once and for all. crews prepared for much of the day before beginning the operation to seal the run-away well permanently. the procedure is called static kill. it will pump heavy drilling mud through the temporary cap that has held the oil

we have a report narrated by kylie morris of independent television news. >> reporter: the flood waters in the punjab arriving so fast the government called for a mass evacuation. only one example of what's happening in towns right across the south. the market, even the hospital locked and left. a city of 250,000 people loading up to leave. these villagers salvage what they can from the murky, broub waters. cots for sleeping and sitting. any timber. a fan once used to keep the family cool, now keeping it all dry is the priority. >> we have nothing to eat. we've had to leave all our livestock behind. all we could do is save our families. >> reporter: now their only sopgs to move on. the waters rising still in this heavily populated province. an island of dry road is their only refuge with no promise of relief any time soon. who gets help and who doesn't is a lottery here. the military is keen to show willing. scenes of well pressed soldiers loading trucks with their own charity donations. but many here are beyond charity. filled with grief at the catastrophe that has befallen them. >> sr