How we'll fly in 2025 -- NASA's vision

NASA has begun testing revolutionary passenger aircraft set to take flight in 2025 that are faster and greener than existing models. 

In late 2010, NASA contracted three design teams from Lockheed Martin, Northrop Grumman and The Boeing Company to work on the models for the rest of 2011. The three teams have already released artist conceptions of what the planes look like, including one by Boeing that?s a dead ringer for the stealth bomber, and another that has the engine perched at the back.

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Amy Cobb Trista Rehn January Jones Tricia Helfer Heidi Klum