I arrive back to the Atlanta airport very late at night, exhausted after weather-delays out of Philly, all after a full day of work. Weighed down by my carry-on bags, I fumble through one bag to find my wallet to pay for the train home. An elderly African-American MARTA representative comes up and asks me if I need help with the machine. As a three-decade user of public transit, I thank him and say, "No, I'm just trying to get my wallet out…”