text: AP: Kids Left in Africa Begged for Change IBADAN, Nigeria - Allegedly abandoned by their American mother in Africa, seven children from Texas begged small change to buy food and shuttled from a neglectful stranger's care to a concrete-block orphanage, Nigerians said Thursday.    Eventually, the children proved their American citizenship to a passing missionary from Texas by singing "The Star-Spangled Banner." He notified U.S...