When Mata Hari's mummified head was discovered missing from the Museum of Anatomy in Paris, biographer Pat Shipman was intrigued. In her rigorously researched new book, Shipman says the exotic dancer who was convicted of spying for the Germans in 1917, and executed by a French firing squad, may not have been pure, but she was likely innocent. The life and times of Mata Hari on this edition of "Take Note". Guest: Pat Shipman