That gunboat you see to your left operates on a 50/50 mix of algae-based fuel and diesel.
The US navy plans to run 50% of its fleet on a mix of renewable fuels and nuclear power by 2020.
The Air Force has already flown a camelina powered A-10 Thunderbolt II , and the Marine Corps, keen to stop the attacks on its fossil fuel caravans, recently sent Company I, Third Battalion to Afghanistan's Helmand province partially powered with solar.
It's worth noting the US is not the world's super power in bio-fuel. That title belongs to Brazil, in large part because the US got sidetracked with corn-based ethanol. Well, certain parts of the US. Not California.