Their daughters, Amy, 39 years old, and Nancy, 42, were born in the U.S., but couldn't pass on their U.S. citizenship to their own children because they left the country when they were very young.

WSJ: Citizenship via Grandparents

One senior U.S. official said the U.S. couldn't yet say "one way or the other" if the information bolstered Turkey's account.

WSJ: Turkey Finds Pilots' Bodies, Providing New Spark for Tensions

When we got there Sudanese officials there said the U.N. couldn't fly even though commercial aircraft were free to come and go as they needed.

CNN: Darfur diary: Best of a bad situation