Politics Keeps Scholars Out of U.S., Critics Say

Withholding visas is said to endanger America's intellectual freedom

June 15, 2007 Premium content for subscribers. Subscribe Today

For nine months, Riyadh Lafta, an Iraqi professor of medicine, tried to get a visa to visit the University of Washington, where he had been invited to share his research on the unusually high rates of cancer among children in southern Iraq.

But by...

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