for scott shafer, i'm thuy vu. thanks for joining us. man: it's like holy mother of comfort food.ion. kastner: throw it down. it's noodle crack. patel: you have to be ready for the heart attack on a platter. crowell: okay, i'm the bacon guy. man: oh, i just did a jig every time i dipped into it. man #2: it just completely blew my mind. woman: it felt like i had a mouthful of raw vegetables and dry dough. sbrocco: oh, please. i want the dessert first! [ laughs ] i told him he had to wait.

for scott shafer, i'm thuy vu. thanks for joining us. san jose and santa clara county have the 7th largest homeless population in the country. we've seen the sad reality of homeless veterans and people who are mentally ill. but a lesser-known population also exists here. homeless young people. we'll look at the problem and solutions on this edition of equal time. hello and welcome to the campus of san jose state in this edition of equal time. i'm your host, journalism school director bob rucker. it is obvious just by taking a walk through downtown san jose

for scott shafer, i'm thuy vu. thanks for joining us. captioning sponsored by wnet >> sreenivasan: on this edition for sunday september 13... on the road with migrant families trying to get through europe. >> the camp "rules" change constantly. one day refugees can cross the path between the fields, the next day they can't. >> why won't you let me across? i just want to go to my family-- right there! >> sreenivasan: why living in a smaller city is costing you more to fly. and the rise of sneaker culture. >> this 2009 collaboration sneaker between louis vuitton and kanye west retailed for $960. this ebay seller is asking for $3,400 for her pair. >> sreenivasan: next on pbs newshour weekend. >> pbs newshour weekend is made possible by:

as scott shafer from our san francisco station kqed reports, the threat may not be visible to the naked, but it changes the very chemistry of essential parts of the marine ecosystem. >> reporter: coral reefs like these, vibrant and teeming with life, may hold clues to the future of the world's oceans. >> coral reefs make up a fraction of 1% of the ocean, but they hold 25% of the ocean's species. not only that, they feed hundreds of millions of people and a billion people or more get income from coral reefs. so this is an ecosystem that is really fundamental to human on the planet. >> reporter: steve palumbi is the director of stanford university's hopkins marine station. he has studied coral reefs around the world. for decades, warming ocean waters have damaged, even killed coral. but palumbi says reefs are now facing an insidious threat from a chemical change that is making ocean water more acidic. >> ocean acidification affects the entire globe's oceans. it affects organisms by reducing their growth rate, by making it more difficult for them to grow shells. we know that fish actually