O Fallon MOCowling Enterprises After 16 yrs. as a letter carrier, my asthma and back have caused me too many problems to continue, so I am having to file for disability retirement. This has... After 16 yrs. as a letter carrier, my asthma and back have caused me too many problems to continue, so I am having to file for disability retirement. This has created so many new challenges, but I continue to press on toward my goal of moving to Alabama to be near my granddaughter, age 2, my son...