ENTERPRISE, Ala. - America's last known Civil War widow never had a hoop skirt or a mansion like Tara. Alberta Martin was a sharecropper's daughter with a young baby and no job when, in 1927, she married a man 60 years her senior. Yes, former Confederate soldier William Jasper Martin was old, but his $50-a.m.onth pension as a Civil War veteran ensured there would be food on the table and - many years later - fame. "Miz Alberta," as everyone calls her, is 97 now and in a wheelchair. But Civil War re-enactors and history buffs take her to Sons...