Week we learn more information that could potentially surge or sink. brenda buttner has more. >> the bulls taking a breather, giving way to the bears? a series of steep declines sent the dow to the biggest weekly drop in more than a year. some surprise earnings from retailers hit hard, both the low end, walmart and high end, nordstroms worry about consumer spending plans. will best buy, staples, home depot opening their books this week have something different to say? wall street watching for sale signs on main street this week. we get word on existing home sales and report on new homes, and r...