replacing princes with people loyal to him and amassing power personally. we've talked about his dramatic social reforms. >> a royal decree has been issued giving women the right to drive. >> and we've talked about his harsh treatment of some of those who advocated for those reforms. >> rights groups say women activists have been subjected to torture and assault in saudi jails. >> but even as saudi human rights abuses continue, mbs is making vital changes to a once backward kingdom. >> if mohammad bin salman the reformer didn't exist, the saudi system would have had to invent him. oil is running out. their population is going up. there is no time to waste. >> while skyrocketing oil prices drive saudi arabia's fastest growth in a decade, the prince