No one showcases moral ambiguity better than Clint Eastwood, so it’s no surprise that his military biopic American Sniper (A-) depicts sharp-shooter Chris Kyle in all his heroic glory punctuated with pangs of crisis of conscience. Told in four Iraq tours of duty with domestic dissonance in between, the film is most effective at spotlighting its protagonist’s laser-focused attention to his craft. Bradley Cooper is superb with a Texas drawl and a single-mindedness of purpose, and Sienna Miller makes the most of the role of his wife. The film hardly traverses much new terrain but does so with style and substance. After some sleepier outings, Eastwood crafts a propulsive, absorbing drama that takes viewers into the heart of military heroism.