Jane Pauley hosts a special "At Home" broadcast. In our cover story, David Pogue looks at what has been fueling the exploding real estate market. Martha Teichner sits down with Ben and Erin Napier, of HGTV's "Home Town"; Anthony Mason interviews David Crosby, Stephen Stills and Graham Nash about their timeless music. Kelefa Sanneh examines the ordeal of homelessness in America. and Lee Cowan travels to Whittier, Alaska, where the majority of residents live under one roof.

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