BY FROMA HARROP In Las Vegas, house prices have dropped 55% since peaking in August 2006, and the foreclosure rate is seven times the national average. Gigantic new condo towers sit nearly empty [real-estate pros call them “see-through buildings”], and unemployment tops 13%. The recession has sent casino revenues plunging 20% from two years ago. “Up until the ’90s, we never suffered with the downturn of the economy,” William Thompson, a professor at the University […]