The head of the Army's rapid capability development unit on Wednesday said China's strong development of hypersonics was due to a major head start over the U.S. and called on the defense industry to harden its cyber defenses against China and other adversaries. China has been developing hypersonics for 20 years and is now seeing the benefits of that long timeline, Lt. Gen. Neil Thurgood, director of the Rapid Capabilities and Critical Technologies Office, said at the Space and Missile...