NEW ORLEANS (AP) — Imagine that your home was reduced to mold-covered wood framing by Hurricane Katrina. Desperate for money to rebuild, you engage in a frustrating bureaucratic process, and after months of living in a government provided-trailer that gives off formaldehyde fumes you finally win a federal grant. Then a collector announces that you have to pay back thousands of dollars. Thousands of Katrina victims may be in the same boat. A private contractor under investigation for the compensation it received to run the Road Home grant program for Katrina victims says that in the rush to deliver aid...