<p>This photo provided by Taco Bell shows a new advertisement for Doritos Locos Tacos shells. The Mexican-style chain rolls out the Doritos Locos Tacos shells at midnight on Wednesday, March 7, 2012 at its nearly 5,600 restaurants nationwide. The fast-food chain, a unit of Yum Brands Inc., calls it the biggest product launch in its 50-year history. (AP Photo/Taco Bell)</p>
March 8, 2012
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March 8, 2012 8:15 p.m.
Nacho ordinary taco
Taco Bell introduces Doritos taco shell
LOUISVILLE, Ky. - Taco Bell hopes to turn orange Doritos cheese powder into green - as in cash from its latest invention.