After seeing double-digit growth in South Korea, Uber Technologies has announced a strategic plan to double down in the country — directly challenging market leader Kakao Mobility, the ride-hailing unit majority-owned South Korean messaging and tech giant Kakao. Uber chief executive officer Dara Khosrowshahi outlined the plans in a press conference in Seoul, where he also kicked off a campaign to grow the company's pool of drivers in the country. That will need to be a major effort. Currently Korea's rideha ...