Article Photos: Rising riches: 1 in 5 in US reaches affluence 1/2

ADVANCE FOR MONDAY, DEC. 9 AND THEREAFTER - This photo taken Tuesday, Nov. 5, 2013, shows gallery owner Deborah Sponder walking her dog in the Design District neighborhood of Miami. It's not just the wealthiest 1 percent: Fully 20 percent of U.S. adults become rich for parts of their lives, wielding outsized influence on America's economy and politics. And this little-known group may pose the biggest barrier to reducing the nation's income inequality. While the growing numbers of the U.S. poor have been well documented, survey data provided exclusively to The Associated Press detail the flip side of the record income gap: the rise of the "new rich." (AP Photo/Lynne Sladky)