In a video celebrating the 30th anniversary of the Nissan Technical Center in Atsugi, the Japanese automaker accidentally showed a pre-production prototype of the 2013 Altima sedan without any camouflage.The find was made by Mike Magrath from Insideline who was able to capture a screen shot of the car before Nissan pulled out the video replacing it with a revised version (3.44 minutes into the clip) that displays a covered up prototype of the Infiniti JX crossover in its place.
Source;
http://www.carscoop.blogspot.com/2012/02/all-new-2013-nissan-altima.html