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PLANE WRECKAGE / DEBRIS FOUND: Missing Plane Boeing 777 flight MH370

Oxygen masks do not work above 40,000 ft.

Read under the section "Need for Cabin Pressurization", "Hypoxia".

http://en.wikipedia.org/wiki/Cabin_pressurization

Page 4 confirms this as well:

http://www.faa.gov/pilots/safety/pilotsafetybrochu...
All times are GMT -8. The time now is February 25, 2018 9:46 am.