About 83,000 U.S. service members are missing from past conflicts dating back to World War II. The Pentagon’s efforts to find and identify their remains have been described as sluggish and inept. The far-flung operation set up to do the work completes just 72 cases on average. Brenda Farrell is director of defense capabilities and management issues at the Government Accountability Office. In a report making waves on Capitol Hill, she blames two leaders in particular for failing to resolve longstanding disagreements.