Adel Eldin congratulates his wife, Ghada, 33, formerly of Cairo, Egypt, as she looks over her certificate of United States citizenship after a naturalization ceremony Wednesday morning at the Tampa Convention Center. Sixty countries were represented among the 636 persons naturalized in two ceremonies. The Eldins, both doctors, live in Spring Hill. "Americans really appreciate their country," Ghada Eldin said. "I saw this before and after Sept. 11."