First announced last week, Facebook's new news creation and curation tool, Paper, is now available for download in the United States. Paper is a news reader that obtains content from a user's Facebook News Feed and from well-known online news sites and publications. Like competing apps such as Flipboard and Zite, Paper features a magazine-style layout with individual section categories for content. Your Paper is made of stories and themed sections, so you can follow your favorite interests. The first section in Paper is your Facebook News Feed, where you'll enjoy inspiring new designs for photos, videos, and longer writ