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(Do you know) 1st airplane flight over the Mt Everest ....

3rd April,1933.
Do you know when the world's first airplane over Mt Everest? If not, let's know. You might know that the first successful airplane was built by two brothers Orville and Wilbur Wright, which flew on 17 December 1903.
Mazzaplus

 But when I talk about the world's first passenger airplane, it was successful in flying on 14 May 1908. And the world's first airplane flight over the Himalayas on 3 April 1933.

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