The wealthiest Americans saw their income nearly triple in the three decades to 2007, substantially more than all other segments of the population, the Congressional Budget Office said Tuesday.

The Obama administration is revamping a program that's designed to let more homeowners refinance their mortgages even if they don't have any equity. This isn't a new program, but instead attempts to turbo-charge an existing federal initiative called the Home Affordable Refinance Program. Here's a look at some frequently asked questions.