The Grob G-520 Strato (Egret), was originally intended as a cheap alternative to the U-2. Of the six built, one flies for Australia, while four remain in service in the US, utilized by agencies like the CIA and DEA as platforms for ELINT and high-altitude radio relay, as well as atmospheric sciences.
http://www.spyflight.co.uk/grob%20new.htm
http://www.airliners.net/open.file/1192736/M/
http://www.airliners.net/open.file/0097909/M/
here... I've found it on Wikipedia
http://en.wikipedia.org/wiki/Army-Lockheed_YO-3A
http://images.google.com/images?q=YO-3A&ie=UTF-8&oe=UTF-8&client=firefox-a&rls=org.mozilla:en-US:official&sa=N&tab=wi
I am convinced this is much larger than the aircraft pictured. and I believe it is jet powered.
http://www.yo-3a.com/history.html
Note the way the vertical stabilizer is forward of the horizonal stabilizer; the shape of the wing, and the single seat cockpit. It's just the propeller that is either missing or too small to see.
http://www.spyflight.co.uk/grob%20new.htm
http://www.airliners.net/open.file/1192736/M/
http://www.airliners.net/open.file/0097909/M/