155th Night Photo Reconnaissance Squadron

Just out of curiosity, I was wondering why the 155th Night Photo Reconnaissance Squadron isn't listed among the squadrons under the 10th PRG in this forum?
 
I always thought the 155th was part of the 10th PRG.

Hello:
 
I can't remember if I ever posted a nice link about a trip I made to Normandy to visit the grave of a member of the 155th (F/O Richard Lynch) who was killed in action. 
 
http://ambrosecampion.blogspot.com/2007/07/longest-day-normandy-june-5-2007.html
 
 

Hi Mark,
I met you and your family at Offutt Air Force Base during the memorial dedication for those in the 155th who were killed in action.  I hope you have all been doing well.  My Dad passed away in February 2011 at the great age of 89. 
Greg