3 objects in a triangle formation

I was driving south on I-225 around the 6th Ave exit around 11-11:30 am on Sunday 1/31/21.  When I looked to my left and noticed 3 objects flying in a triangle formation.  They were moving very slow and had a very strange contrail that moved around them almost like it would be a high speed re-entry type.  This was not like a normal aircraft where the contrail comes out of the back of the engine on each wing or the tail of the aircraft.  I watch it for at least 5 minutes until I drove past it, if I was not driving I could have watched it for a lot longer.  I am an A&P mechanic that works for a major airline and the reason I am reporting this, is because this was 100% not normal.