Chronic homelessness can seem like an intractable problem in America, but in fact there's a new experiment going on in many cities across the country that's solving the problem and changing the way social workers think about homelesness. The solution? Give people homes without any preconditions attached. Called Housing First, it's a revolutionary new paradigm of tackling chronic homelessness. Sam Tsemberis is the mind behind this new way of treating homelessness. He says his strategy's been effective in places like New York, Washington, D.C. and Utah.