Reuters: Ever since the rise of the automobile in the 1950s, the American Dream has featured a home in the suburbs and two cars in the garage. Now the iconic white picket fence comes with a hefty price tag in the form of the cost of the gasoline needed to drive to work and to the supermarket, and the suburban idyll is under review. In different parts of the United States, there are signs of change. While home prices in the suburbs have crashed, apartments in city centers are in demand. …