Obama unveils presidential library designs

Barack Obama on Wednesday unveiled the vision for his presidential library in Chicago, a modern, $500 million project he hopes will be a training ground for future leaders housed in the city that launched his career.The site is slated to be upwards of 225,000 square feet in size and house a library, museum and forum -- as well as classrooms, meeting spaces, a community garden and a recreational area.The goal was to "create an institution that will train the next generation of leadership," Obama