NASHVILLE, TN -- The Army’s existing aircraft are "the best in the world," but technological advances and a more complex future operational environment necessitate drastic changes, according to the service’s vice chief of staff. Gen. James McConville told attendees at the Army Aviation Association of America’s annual summit, "when you start running out of letters for incremental improvements, it’s time for new rotorcraft." He emphasized the value of Future Vertical Lift, while saying the new aircraft will not change the...