<p>An Indian tribe has forced distributors of an Arab studies guide for U.S. teachers to remove an inaccurate passage that says Muslim explorers preceded Christopher Columbus to North America and became Algonquin chiefs.</p>
<p>Peter DiGangi, director of Canada's Algonquin Nation Secretariat in Quebec, called claims in the book, the "Arab World Studies Notebook," "preposterous" and "outlandish," saying nothing in the tribe's written or oral history support them.</p>
