"I went to Afghanistan last fall with a question: Why, with all our technology, were we killing so many civilians in air strikes? As of September of last year, according to Human Rights Watch, NATO was causing alarmingly high numbers of civilian deaths — 350 by the coalition, compared with 438 by the insurgents... To find out, I spent much of the fall in the Korengal Valley and elsewhere in Kunar province alongside soldiers who were making life-and-death decisions almost every day — decisions that led to the deaths of soldiers and of civilians."