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
![Replica cockpit voice recorder ("black box") on display in the Flight 93 National Memorial Site Visitor Center near Shanksville, PA, United States Stock Photo - Alamy Replica cockpit voice recorder ("black box") on display in the Flight 93 National Memorial Site Visitor Center near Shanksville, PA, United States Stock Photo - Alamy](https://c8.alamy.com/comp/KWDWPF/replica-cockpit-voice-recorder-black-box-on-display-in-the-flight-KWDWPF.jpg)
Replica cockpit voice recorder ("black box") on display in the Flight 93 National Memorial Site Visitor Center near Shanksville, PA, United States Stock Photo - Alamy
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Secrets of the black box: how does MH370's flight recorder work? | Malaysia Airlines flight MH370 | The Guardian
![American Artifacts Flight 93 National Memorial : CSPAN3 : September 12, 2020 2:53am-3:55am EDT : Free Borrow & Streaming : Internet Archive American Artifacts Flight 93 National Memorial : CSPAN3 : September 12, 2020 2:53am-3:55am EDT : Free Borrow & Streaming : Internet Archive](https://ia601907.us.archive.org/21/items/CSPAN3_20200912_065300_American_Artifacts_Flight_93_National_Memorial/CSPAN3_20200912_065300_American_Artifacts_Flight_93_National_Memorial.thumbs/CSPAN3_20200912_065300_American_Artifacts_Flight_93_National_Memorial_002518.jpg)