I would like to share with you today an unusual model, a modified model of B747, the Boeing YAL-1A Airborne Laser. Enjoy the pictures!
"The Boeing YAL-1 Airborne Laser Testbed (formerly Airborne Laser) weapons system was a megawatt-class chemical oxygen iodine laser (COIL) mounted inside a modified Boeing 747-400F. It is primarily designed as a missile defense system to destroy tactical ballistic missiles (TBMs) while in boost phase. The aircraft was designated YAL-1A in 2004 by the U.S. Department of Defense."
Some photos from Google and Wikipedia.
To see the USAF Boeing 747-E4B model, just click here: