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Challenge is right under your nose. A cnn special event, the abc News President ial debate simulcast september 10, nine welcome to a gps special reengineering life. The next frontiers in science im Fareed Zakaria Today oN The program. Im going to introduce you to two extraordinary women oN The absolute Cutting Edge of science their work will change the world as we know and iN The process, it will change your life ill introduce you to the socalled godmother of Artificial Intelligence. They fail. Lee a. I. May have only just recently burst onto the global Computer Screen next generation of Artif...

Hello, thanks for joining me. I'm alex marquardt part in this weekend for fredricka whitfield, we begin with breaking news. President biden has been briefed on the raid which injured seven u. S. Troops and killed 15 members of the radical group isis. The raid happened thursday in iraq two of the seven u. S. Troops were evacuated from the area for further treatment, u. S. Central command manages operations in the middle east. They said that the operation targeted i. S. I. S. Leaders in order to disrupt the group's ability to plan further attacks from where we have cnn's chief international puri...

bianna golodryga picks up our coverage now. hello everyone. i'm bianna golodryga. airports are scrambling to get back on schedule after an early morning glitch throws the nation's air travel into chaos. a key safety system for the faa went down forcing a nationwide ground stoup on all domestic departing flights. that's left travelers stranded in airports or trapped on board parked airliners. the ground stop is now lifted, but the backlog of flights is still jamming airports across the country. cnn correspondents and analysts have been following these developments. let's begin with ...

>> what is the fear, richard, about what they can possibly find as they investigate what led to this? are there any other bugs in the system? >> number one, cyber. the secretary said on cnn there was no direct evidence. they're going to want to loose closely to make sure there's no indirect evidence. number two, things are always going to fail. as the secretary said, why did the redundancy not kick in? why did the thing fall over? related to that, even though billions o of dollars have been spent on next wren ration and all of the requests, is it enough? >> david, something i heard from john k...