09.21.01: The final call from Flight 93

Cynthia Bowers talks to operator Lisa Jefferson, who took the final call from United Flight 93. She recalls her conversation with passenger Todd Beamer. (This report was from a DVD included with the tenth anniversary edition of the CBS News/Simon & Schuster book, "What We Saw: The Events of September 11, 2001, in Words, Pictures, and Video.")