ABC News: Sarah Palin's added another trip to her roster: She'll head to South Korea in October to headline the World Knowledge Forum, which runs from Oct. 11 to 13. The organizers of the annual conference of business leaders said Thursday that the former Alaska governor is expected to discuss US leadership in the midst of global economic turmoil. Other speakers include former British prime minister Gordon Brown and Larry Summers, ex-director of President Barack Obama's National Economic Council.