Claimed to be the largest concrete spraying trucks in the world, they will be on their way to Japan, after upgrades in California and South Carolina.

The two trucks are made in Germany, for spraying concrete for skyscrapers.

Kelly Blickle, a spokeswoman at Putzmeister America Inc., says similar types of trucks were also used on Chernobyl in 1986.

Officially the trucks will be spraying water, but if necessary, can spray concrete to entomb the reactors.