the police and law enforcement because we need that for ourselves. now, great people always have problems. you have somebody in there that either makes a mistake that's bad or that chokes. >> reporter: as for hillary clinton, before speaking about the economy that welcomes people with disabilities, she, too, brought up the police shooting. >> it's unbearable, and it needs to become intolerable. >> reporter: then getting back to the economy creating opportunities for americans with disabilities. >> i'm going to provide americans with disabilities a chance to work alongside those without disabilities and do the same jobs for the same pay and benefits. >> reporter: stephanie ramos, abc news, washington. of course, clinton and trump will take center stage on monday squaring off in the first debate. >> stakes could not be higher and this morning we're taking a look at how each candidate is preparing for the showdown.

>> reporter: hillary clinton in orlando in the one of the last time voters see her before monday's big debate. after this, she's hunkering down to cram. >> donald trump is a self proclaimed great debater who won every one of the republican debates, so i take nothing for granted. >> reporter: two very different candidates with two very different debate prep stages. clinton immersing herself in briefing books daily, and also watching footage of trump in past debates and holding mock debates. as for donald trump, this is what he told david recently. >> any mock debates? >> haven't thought about it much, could happen. >> reporter: now trump's team says no mock debates for him, instead, an ipad with footage of clinton, occasionally meets with a team of advisers including family members and former fox news boss roger ailes, but sources say those sessions have

rather than serious preparation. will trump get nervous when he takes that stage? >> a little bit. you have to be a little. >> reporter: the one tactic both sides are using? already complaining about the questions. >> i'm going to get -- be treated very, very unfairly by the moderators. i think the system is being rigged so it's -- it's going to be a very unfair debate. >> reporter: clinton's team says they are worried she'll be the ones getting tougher questions, alluding to the recent commander in chief forum. the stakes couldn't be higher. >> donald trump said about you and the debates, i know how to ha do you know how to handle trump? >> well, we'll see on september 26th. >> reporter: now both teams trying to down play expectations for monday's big debate. in fact, trump's team plans to move his debate prep sessions from his estate in new jersey where there's a golf course to headquarters to trump towers in new york hoping that will help him focus more. cecilia vega abc news, orlando, florida. and be sure to stay with abc news for full team coverage of that first big debate.

9:00 eastern here on abc, and it will be live streamed on abcnews.com. >> it will be a big night. of course, later on after that on tuesday morning, we'll have full analysis right here with the political team, but the candidates are preparing. hillary clinton is off the campaign trail today. donald trump has a rally later tonight in philadelphia suburbs. >> a lot of talk of how they are preparing for all of this. we're hearing from their campaigns they're preparing rather differently. we'll have more on that coming up as well. >> the question that's not been answered, who in the mock debates, if there are mock debates, plays hillary clinton and donald trump? >> i always want to know that. who is fake hillary and who is fake donald? >> that'd be weird. many ideas popping into my head -- not politically correct ideas. >> looking forward to seeing how the debates play out. again, so much anticipation, more so than in other first debates in recent memory. >> absolutely. stay with us. we'll be right back. >> announcer: "world news now"

? so we hear so many stories these days about the power of social media being able to, of course; amplify good deeds of just one person. >> in chicago, an elderly man is

>> reporter: for 23 years, he sold mexican popsicles for $1.50 a pop. two loyal customers who started a go fund me page presented him with a check, $384,290. that's more than a quarter of a million popsicles. 17,000 contributors from 60 countries. he said he may buy a house for his wife and grandchildren and treat himself to some hearing aids and at age 89, finally hang up those bells. david wright, abc news, new york. >> so the original go fund me goal was $3,000. >> yeah. they topped that. more than 380,000. unbelievable. he says he might use the money to buy a house for his grandchildren and wife and may

for himself. >> he has enough money to buy all 31 flavors.

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? facebook founder mark zuckerberg and his wife dr. priscilla chan have opened a new chapter in their philanthropy. after donating millions toward education, they are now throwing $3 billion to the ambitious goal of all but eliminating disease as we know it. carolyn tyler from our station from san francisco with the story. >> reporter: it is an ambitious vision the power couple shared, donating $3 billion over the next decade to jump start research that will cure, prevent or manage all disease by the end

will ever get sick, but it means our children and their children should get sick a lot less. >> reporter: zuckerberg says most people die today of four types of diseases, cancer, heart, neurological or infectious. he believes the answer is to fund research to create new tools and technologies to understand and target the source. >> if we can help develop the new tools that allow us to see these categories of diseases and new ways to experiments, we can empower scnt world to make much faster progress and breakthroughs in these areas. >> reporter: the first tangible step is this bio hub in mission bay, where the best and the brightest from stanford, cal, ucsf will collaborate. >> the scientists are the best and very independent. they haven't always wanted to

but i think that's the way forward. >> reporter: if you think eradicating or managing disease in the next 80 years is more science fiction than science, supporters say major progress can be made. >> it may be a stretch goal to say that we'll get there by the end of the century, but it's certainly not completely unrealistic. >> reporter: microsoft's bill gates dropped by to applaud the new effort. in san francisco, carolyn tyler, abc 7 news. zuckerberg says with the, what they're managing to do, he says he plan expectancy to 100 years and says it doesn't mean no one will ever get sick, but they should be able to treat it or manage it. >> it's great to see him put his money to great causes throughout the years. that's the news for this half hour. anage it. >> it's great to see him put his money to great causes throughout the years. that's the news for this half

right now....firefighters are still at the scene of that fire at the golden nugget hotel. firefighters tell us the fire started in one room of the hotel when someone fell asleep smoking. three floors were evacuated overnight while the fire was put out. fortunately no one was injured and the fire was confined to just one room. fire crews estimate the fire caused about 10-thousand dollars 13 action news reporter marissa kynaston is headed to the scene right now. she'll have a live report at five. thanks dayna.. good morning las vegas! i'm ... and i'm xxx.... the time now is ... let's get started with 13 first alert meteorologist greg bennett... ((ad-lib)) as tropical moisture moves out, high pressure begins to move into the valley. during this transition, the air gets compressed and bottlenecks