PORTSMOUTH, VA -- The Marine Corps must determine by 2025 whether to pursue a high-water-speed option getting troops from the ship to the beach or buy a slower wheeled or tracked vehicle to support its lift requirements. Col. Kirk Mullins, Amphibious Combat Vehicle Increment 1.1 deputy program manager, told Inside the Navy here Oct. 12 the future operational environment requires Marines to traverse somewhere between 60 to 100 nautical miles. Back when the Expeditionary Fighting Vehicle was developed, the...