These are actual photographs of an aircraft breaking through the sound barrier.  The noise causes a “sonic boom” for which scientists have endeavored to explain.  To further explore this phenomenon, click on any one of the above highlighted text words.  Until then, hope you enjoy the pictures. 
 

Photo One
 
“A USAF B1B makes a high speed pass very near the sound
barrier at the Pensacola Beach, Florida airshow” on
July 12, 2002. Photo copyright Gregg Stansbery

Photo Two
 
This is a U.S. Navy F-18 Blue Angel Aircraft breaking
through the barrier. Image source unknown.

Photo Three

“This Navy Boeing F/A-18F Super Hornet approaches the
sound barrier.  Due to the high humidity at Oceana the
shock wave is clearly visible.” September 25, 2004.
Photo copyright Andreas Zeitler.

Photo Four
 
“Lt. Col. William Chester Waldron, Commanding Officer
of the Black Knights Marine of Fighter Attack Squadron
Three One Four (VMFA-314) performs a supersonic fly-by”
on January 29, 2004. U.S. Navy Photo taken byChris M. Valdez

Photo Five

“An F/A-18 Hornet assigned to Strike Fighter Squadron
One Five One (VFA-151) breaks the sound barrier in
the skies over the Pacific Ocean” on July 7, 1999.
U.S. Navy photo taken by John Gay.

Photo Six
U.S. Navy F-14 Tomcat breaking the Sound Barrier.
Image source unknown.

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Text Information Source: http://urbanlegends.about.com/library/bl_sonic_boom.htm
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