. >>> this is pbc newshour weekend sunday. >>> and now the latest on a story that the newshour has beenollowing for some time now. a new and growing outbreak of polio overseas. 80% of the new cases are in pakistan. itn's military correspondent john ray has the latest from that nation. >> reporter: on karachi's streets you can meet many who serve as a reminder of the limbs and lives wasted by polio and understand just how desperate the battle is to prevent its return. at times that battle can seem like a real war. a simple vaccine offers immunity. even the promise of good health comes at the point of a gun. it might seem strange that it takes an armed escort to deliver vaccines, but there are good and disturbing reasons for the guns. in trying to save children, these health workers are themselves risking their lives. the taliban has targeted the team, women like this doctor. >> they're attacking us. >> reporter: religious leaders have issued a fatwa ordering their parents to bring their children for vaccination. but many remain distrustful. it is well known that the program is to hunt os

. >>> this is pbc "newshour weekend sunday." >>> as bhenwe mentioned the whi house correspondents' dinners last night and the president took playful shots at just about everyone including himself. >> last year was rough. sheesh. at one point things got so bad the 47% called mitt romney to apologize. of course we rolled out healthcare.gov. that could have gone better. in 2008 my slogan was yes, we can. in 2013 my slogan was control alt delete. >> he didn't spare his vice president. >> you may have heard the other day hillary had to dodge a flying shoe at a press conference. >> he targeted the media. >> i am happy to be here, even though i am a little jet lagged from my trip to malaysia. the lengths we have to go to to get cnn coverage these days. >> and, of course, he went after republicans. >> just yesterday i read a heartbreaking letter. you know, i get letters from folks around the country every day. i get ten that i read. this one got to me. virginia man who has been stuck in the same part-time job for years. no respect from his boss, no chance to get ahead. i really wish eric cantor w