If this wasn’t so sad and so unbelievably unreal how many Americans are still asleep, I would have a fun time looking through all of the pictures which have convinced us that actual planes were involved.
This one takes the cake and eats it too.
In case you are wondering: The speed of sound is 343 metres per second (1,125 ft/s). This equates to 1,236 kilometres per hour (768 mph), or about one kilometer in three seconds and about one mile in five seconds.
http://en.wikipedia.org/wiki/Speed_of_sound
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