This image provided by the U.S. Army shows Maj. Gen. Harold J. Greene. A U.S. official has identified the senior officer killed in Afghanistan on Aug. 5, 2014, as Greene, the highest-ranking American officer killed in combat since 1970. Greene was the deputy commanding general, Combined Security Transition Command-Afghanistan. An engineer by training, Greene was involved in preparing Afghan forces for the time when U.S.-coalition troops leave at the end of this year. (AP Photo/U.S. Army)
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