Wikipedia: The Expeditionary Fighting Vehicle (EFV) (formerly known as the Advanced Amphibious Assault Vehicle) was an amphibious assault vehicle that was being developed for the U.S. Marine Corps. It is launched at sea, from an amphibious assault ship beyond the horizon, able to transport a full Marine rifle squad to shore. It would maneuver cross country with an agility and mobility equal to or greater than the M1 Abrams.
The EFV was designed to replace the aging AAV-7A1 Assault Amphibious Vehicle (AAV), which entered service in 1972, and was the Marine Corps' number one priority ground weapon system acquisition. It has three times the speed in water and about twice the armor of the AAV, as well as superior firepower. The vehicle was planned to be deployed in 2015; however, on 6 January 2011, Secretary of Defense Robert Gates announced that he recommends the EFV program be canceled. The program, which is projected to cost $15 billion, has already cost $3 billion.
The Marines have asked for the EFV to be canceled in favor of the Assault Amphibian Vehicle Service Life Extension Program, the Marine Personnel Carrier and the Amphibious Combat Vehicle.