The Marine Corps’ Amphibious Combat Vehicle is operationally effective as a stationary command post, but not as a mobile one, according to an annual report from the Pentagon’s chief weapons tester. The report, released Friday by the Office of the Director of Operational Test and Evaluation , declares the Command and Control ACV variant “suitable and survivable to most threshold ballistic threats,” but says that the vehicle is still vulnerable to cyberattacks and does not have enough beyond-line-of-sight voice and...