Where is the largest desert in North America?

The Great Basin, covering parts of Nevada, Utah, Idaho, and Oregon

oh boy thats not what i have here...

The Chihuahuan Desert is also listed as the largest in a different site; here are the conflicting sites: I will research further to determine the correct answer.

http://www.earlham.edu/~biol/desert/ecology.htm

http://helios.bto.ed.ac.uk/bto/desbiome/northame.htm

Thanks Racer that last one you listed is the one I have. my information says its 140,000 square miles includes parts of Texas, Arizona, new mexico and the country of mexico. If you find out anymore on it please let me know ok? Thanks!