2006 NRAC Status - High Altitude Airships <A HREF="http://www.onr.navy.mil/nrac/docs/2006_rpt_lighter_than_air.pdf" target="_blank">http://www.onr.navy.mil/nrac/docs/2006_rpt_lighter_than_air.pdf</A> Okay. Your assignment, if you chose to accept it.: Read page number 79 over and over and over again until you've drawn a logical conclusion. Discuss. Also to note: Raytheon has been developing their XTRA X-Band array since before 2004.: <A HREF="http://tinyurl.com/ntupz" target="_blank">http://tinyurl.com/ntupz</A> And an official release here: <A HREF="http://tinyurl.com/nbmw5" target="_blank">http://tinyurl.com/nbmw5</A>