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EPA Mandates Cleaner Diesel, Cleaner Truck Engines

New rules issued on Thursday by the US Environmental Protection Agency requires oil refineries to begin making ultra-low-sulfur diesel, "a fuel with 97 percent less sulfur than ordinary diesel," which will cut smog-forming emissions by 10 percent.

Why a German Pilot Escorted a U.S. Bomber to Safety During World War II

Once in a while, you hear an old war story that restores your faith in humanity. A new book explores the incredible encounter of two WWII pilots in mid-air -- a rookie American on his first bombing mission, piloting a crippled aircraft that was missing an engine and a German flying ace who not only saluted, then spared the rookie, but escorted him out of enemy airspace.