(NYT37) ALPHARETTA, Ga. -- May 31, 2005 -- CLASS-ROOTLES-4S -- Kristina Link, 11, watches a movie as dhe is driven to a soccer match by her parents, Jim and Kathy Link, in Alpharetta, Ga., on Nov. 14, 2004. The Links belong to a growing segment of the upper middle class, executive gypsies. The shock troops of companies that continually expand across the country and abroad, they move every few years. (Nicole Bengiveno/The New York Times)