Presently our burns are most successful in blocks of uniform fuel like slash or prairie.

"Congress long ago made clear there should be a uniform fuel economy standard," Mr. McLellan said.

Grade 2 fuel is adequate for most industrial uses, especially where low ambient temperatures exist and uniform fuel volatility is important.

On a barren rock in the Norwegian Sea they would take apart the old bombs, one at a time, and turn them into uniform fuel capsules for the Daedalus craft.