Here are two generations of airplanes. The McDonnell Douglas (now Boeing) F-15 Eagle jet is from today's era. The North American P-51 Mustang which saw action in the WW2 European theater. This flight is called it the "Heritage Flight". This picture was taken when I watched the air show at 2007 Selfridge Air National Guard Base near Mt. Clemens, Michigan.
<a rel="nofollow" class="external text" href="https://www.flickr.com/people/87659272@N00">George E. Norkus</a>
CC BY 2.0
<a rel="nofollow" class="external text" href="https://www.flickr.com/photos/87659272@N00/1061541629/">Heritage Flight</a>