CARR CANYON - Public opinion polls show illegal immigration as the chief concern for most Arizonans, but the history of the land now known as Arizona is the history of migration, according to Dr. John Ware, executive director of the Amerind Foundation. "We're a culture of migrants here," Ware told an audience of about 20 people Sunday afternoon at the Carr House Information Center. Not only are we all migrants, we're all of African stock, Ware added. What he described as "genetic markers" prove that modern humans evolved in Africa about 100,000 years ago and gradually spread around the planet,...