SIMI VALLEY, CA -- The Marine Corps is open to one day adopting a hypersonic strike weapon if its size is not too cumbersome for new front-line units being designed to operate in contested areas, said the service's top general, who allowed the service "could be" interested in a Defense Advanced Research Projects Agency effort called OpFires. Marine Corps Commandant Gen. David Berger told reporters here on the sidelines of the Reagan National Defense Forum that the ground and maritime...