CHARLESTON, SC -- The two companies competing to replace the Marine Corps' Vietnam-era amphibious vehicles will receive an incentive fee from the government for delivering prototypes early, according to a service official. John Garner, the Marine Corps' advanced amphibious assault program manager, told Inside the Navy Feb. 21 at Science Applications International Corp.'s production facility here that Amphibious Combat Vehicle Increment 1.1 prototype testing will kick off March 15. Garner anticipates accepting the first prototype vehicle from SAIC on Feb...