schifrin. >> reporter: in the name of fighting corruption, crown prince mohammad bin salman is stamping out opposition and cementing his rule. the 32-year-old ordered the arrests of more than a dozen, including prince alwaleed bin talal, a billionaire who has major investments in citigroup, twitter and apple. prince mutaib bin abdullah, the former national guard chief and most obvious rival. it's not the first house of saud shakeup, but it's the most rapid. and it centralizes mohammad bin salman's power over the military and security services that began earlier this year, when he replaced mohammed bin nayef, the former heir to the throne. state tv announced the arrests and accused the princes of embezzlement and stealing public money. that was a message to a saudi population that's sick of ostentatious royal wealth, and eager for reform. that reform is what mohammad bin salman is selling, as state owned oil company aramco plans to go public and diversify. mohammad bin salman has vowed to modernize, and fight extremism. >> ( translated ): we only want to go back to what we were: moderate isl

arabia is unprecedented. it has given this man, crown prince mohammad bin salman, enormous control of the richest arab nation. this matters to the rest of the world. why? because a stable saudi arabia is seen as an anchor of stability in a volatile middle east, but purging so many senior figures so publicly is a risky move. the crown prince may be popular with young saudis, but his enemies are multiplying. the house of saudi's really sensitive to this notion that it's corrupt, that it's feeding off public funds, so he will be popular with those measures, but at the same time there is an entrenched elite that has grown fat off the system, and it's going to fight back, it's going to push back, so he has this balance between popularity on the street and raising tensions within the elites in society. much will now depend on the continued loyalty of the tribes and their leaders. modern saudi arabia only became united in 1932. there will be now fears that the glue which held it together risks becoming dangerously unstuck. frank gardner, bbc news. a century ago this week, bolshevikforces,

ministers, have been detained in a campaign to stamp out corruption. crown prince mohammad bin salman, who's in charge of the new anti—corruption committee, appears to have sidelined powerful rivals. it seems the heads of the saudi national guard and navy have been replaced. we'll bring you more on that as we get it. we stay in saudi arabia because state media there says the military has shot down a missile over the capital, riyadh. officials believe the weapon was fired from yemen,

, saudi crowned prince mohammad bin salman is in the lead with 20%. tied with 5% is donald trump, the dreamers and the me too movement. >>> uber keeps making news. this week a driver posing as an uber driver was charged with sexually assaulting a woman at american university. then it came out the company was hacked. millions of users had their data compromised and now a driver came to us for help. here's transportation reporter pete muntean. >> it's stressful. >> reporter: our drive showed us her uber app but -- driver showed us her uber app but not her face. she is worried about her safety and her job if word got out. >> next time i may not be so lucky. >> reporter: our driver said she was assaulted earlier this year. three men came into her car, rude, loud and in her physical space. they left before she could call the police. but all she got was a seemingly canned response. >> i had to think about it do i really want to do this anymore? >> reporter: on monday a former uber drive was charged with sexually assault -- driver was charged with sexually assaulting a woman at the universit