USAF video link (4 minutes long)
USAF - Providing B1 + B2 and B52 for Super Bowl 55 flyover.
The total of these is 55, or 5 by 5 if you will.
Even better is the guy describing at the 2 min 40 second mark in the linked video. Also catch the BOOM OPERATOR patch earlier.
https://sports.yahoo.com/steve-wyche-gives-behind-scenes-234109702.html
Screenshots:
https://imgflip.com/i/4x47km