MIT Students created a robotic airplane that can fly at high speeds, through obstacles, using only on-board sensors. And it's doing all that without benefit of GPS.

Watch video at: http://www.mashable.com/2012/08/12/robotic-airplane/

Also, don't miss to watch the innovative use of quad in the start

full video:

Really Genius 

Wow

wow.... awesome 

we are working on the same thing in our collage....

we have been able to make it fly at a specific height and in a specific pattern..... without GPS.... just sensors...

still not able to  compensate for the complete automation especially the winds and the obstacles.... will do that soon and post the results...!

@AEROVISHWA

Best of luck 

please keep us update with the next level progress if possible