Sub-prime mortgages led the housing market into decline, one of the major factors in the Great Recession. Now the market is looking up, at least in some places. Home sales have reached their highest volume in three years, with 12 consecutive months of prices higher than the year before. It's the first time that's happened since 2006. We get an update from Walter Molony, spokesman for the National Association of Realtors, and Julie Schmit, who reports on housing for USA Today.