Below is where I found information for this book.

Heres what i used/ watched for my research for this book,

Flight 93, the story, the aftermath, and the legacy of the american courage on 9/11

These videos tell about Flight attendant Cee Cee Lyles.

https://m.youtube.com/watch?v=VErF4n7BouE

https://m.youtube.com/watch?v=TG5bFq5Bru8

Call to Service: The Final Rescue of 9/11 - YouTube
https://m.youtube.com/watch?v=E7ANxk0aErs&pp=QAFIAg%3D%3D

The flight 93 friends and family website where you can see information about each passenger and crew.

https://www.flight93friends.org/flight-93-passengers-crew

Things I found on encyclopedia

https://www.encyclopedia.com/politics/energy-government-and-defense-magazines/transcript-flight-attendant-betty-ong#:~:text=At%208%3A20%20a.m.%2C%20flight,%22female%20voice%22%20below

Video of flight 77 hitting the pentagon

https://m.youtube.com/watch?v=0SL2PzzOiF8&pp=ygUSUGVudGFnb24gYmVpbmcgaGl0

Link with an interview with Lisa Jefferson who took Todd Beamers call on 9/11

Video with an interview with Todd beamers dad.

'LET'S ROLL': Todd Beamer's dad talks about a crucial 20 minutes on 9/11 - YouTube
https://m.youtube.com/watch?v=QcYKzF0kZDI&pp=QAFIAQ%3D%3D

Some articles on Flight 93

https://911memorial.org/node/89391

https://www.cnn.com/2013/07/27/us/flight-93-national-memorial-fast-facts/index.html

And many more