Heidi Squier Kraft, author of a new memoir called Rule Number Two: Lessons I Learned in a Combat Hospital, served more than seven months as a clinical psychologist at a remote air base in western Iraq.
The book's title is based on two rules of war from the TV show M*A*S*H: (1) that young men die; and (2) that doctors can't change rule No. 1.
Kraft talks with Melissa Block.
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