(CNN) — A secret investigation into alleged sexual abuse at the US Coast Guard Academy, the training ground for the Coast Guard’s top officers, uncovered a dark history of rapes, assaults and other serious misconduct being ignored and, at times, covered up by high-ranking officials. The findings of the probe, dubbed “Operation Fouled Anchor,” were kept confidential by the agency’s top leadership for several years. Coast Guard officials briefed members of Congress this month a