An interesting set of photos of aircrafts shot during the transition to supersonic flight showing the shockwafe fan which forms in correspondence of sudden variation of the body shell.
http://www.repubblica.it/2006/05/gallerie/scienzaetecnologia/aerei-supersonici/1.html
http://www.repubblica.it/2006/05/gallerie/scienzaetecnologia/aerei-supersonici/1.html