Millions of Americans can’t afford rent and only a quarter of those who need government help get it. What happens to everybody else?

In Dallas and other tight rental markets, Section 8 voucher holders can't find the homes they need, while developers face resistance from wealthier neighborhoods when trying to build new housing.

As part of our joint investigation into the affordable housing crisis, FRONTLINE and NPR took a closer look at the nation's largest housing construction program for low-income renters.

The Low-Income Housing Tax Credit program gave way to a booming $8 billion private industry, but as tax credits for companies increased, the number of housing units being built for the poor fell.