In this Monday, Feb. 3, 2014, photo, Mary-Jane Harrison spends time with her granddaughter, Robyn, in San Antonio. Like nearly 78 million American adults, Harrison is obese, and because of stress fractures in her legs she is unable to able to walk up or down the stairs of her two-story home. (AP Photo/Eric Gay)WASHINGTON (AP) — Like 78 million other Americans, MaryJane Harrison is obese.