How is it on 9/11 all 4 black boxes were 'destroyed in the crash/fire' yet the passports of the terrorists, made of paper, inside the plane survived? - Quora
![Plane crash in France kills 150, black box found(9/11) - Headlines, features, photo and videos from ecns.cn|china|news|chinanews|ecns|cns Plane crash in France kills 150, black box found(9/11) - Headlines, features, photo and videos from ecns.cn|china|news|chinanews|ecns|cns](http://www.ecns.cn/hd/2015/03/25/e88d613c260e493fbb712bde609a1510.jpg)
Plane crash in France kills 150, black box found(9/11) - Headlines, features, photo and videos from ecns.cn|china|news|chinanews|ecns|cns
Why wasn't one single black box recovered from any of the crashes on 9/11? Also, was any wreckage found at any of the crash sites? - Quora
![Secrets of the black box: how does MH370's flight recorder work? | Malaysia Airlines flight MH370 | The Guardian Secrets of the black box: how does MH370's flight recorder work? | Malaysia Airlines flight MH370 | The Guardian](https://i.guim.co.uk/img/static/sys-images/Guardian/Pix/pictures/2014/3/31/1396284376350/The-flight-data-recorder--008.jpg?width=300&quality=45&auto=format&fit=max&dpr=2&s=d8bf1c4022568413a1b77906ec3d354a)
Secrets of the black box: how does MH370's flight recorder work? | Malaysia Airlines flight MH370 | The Guardian
![Malaysia Airlines Flight 370: Why Can't They Find Any Floating Debris? | Johns Hopkins University Press Blog Malaysia Airlines Flight 370: Why Can't They Find Any Floating Debris? | Johns Hopkins University Press Blog](https://jhupress.files.wordpress.com/2014/04/bibefpo.jpg)