The next housing shock - As more and more Americans face mortgage foreclosure, banks' crucial ownership documents for the properties are often unclear and are sometimes even bogus - a condition that's causing lawsuits and hampering an already weak housing market.The co-founder - Lesley Stahl speaks to Microsoft co-founder and billionaire Paul Allen in his first interview about his upcoming book in which he criticizes his Microsoft co-founder, Bill Gates.Eminem - Anderson Cooper profiles the chart-topping rapper from Detroit who overcame addiction to reclaim the winning style that made him the biggest selling artist of the past decade.