When my grandmother asked if I'd interview her for a project that the public radio station was hosting in her hometown of Indianapolis, I knew she meant StoryCorps. Naturally, I said yes.

I routinely linger in my car, listening to the StoryCorps excerpts aired weekly on National Public Radio's “Morning Edition” — day-brightening audio clips of ordinary people reminiscing about their lives. While I'd often thought it would be neat to visit a StoryCorps recording booth with my 86-year-old grandmother, it seemed unlikely we'd get to the permanent studio in New York City's Grand Central Terminal. Then a StoryCorps MobileBooth rolled into town.