 For Marketplace, I'm Nova Safoin for David Brancaccio. Happy Fourth of July. There are all kinds of ideas for how to shrink the government's annual budget shortfall and minimize its impact on the national debt. There are also a lot of ideas about which federal spending actually contributes to annual deficits. Social Security, for example. Marketplace's senior Washington correspondent, Kimberly Adams, is here with more on this. Good morning, Kimberly.