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Pakistani Aafia Siddiqui is currently serving an 86 year sentence in a Texas jail. She was the woman Islamic State said they wanted to trade for the lives of, first, James Foley and then, Steven Sotloff. There was no deal and both men were beheaded. But what do we know about her? In a moment, hear from Aafia Siddiqui's sister. But first analyst Michael Kugelman.

(Photo: A photo released by the FBI in 2004 of Aafia Siddiqui, a Pakistani neuroscientist. Credit: REUTERS/FBI/Handout via Reuters)