Lt. Col. Christopher Ophardt, spokesman for the academy at West Point, said Monday that 73 cadets were accused of cheating on the calculus exam in May after instructors noticed irregularities in answers. All but one were freshmen, or plebes, in a class of 1,200. The other was a sophomore. After an investigation by an honors committee made up of trained cadets, two cases were dropped for lack of evidence and four were dropped because the cadets resigned, Ophardt said. Of the remaining 67 cases, 55 cadets have admitted cheating and have been enrolled in a six-month rehabilitation program focused on...