Additionally the "aircraft" they used for that test was a DC-9 which has not been produced since the mid-1980s. The technology then has dramatically been improved upon and materials used in the construction of the aircraft that are widely in use today are rather different.
I saw a .40 S&W FHS fired directly into the window and it did not penetrate all the way through, although they suggest that discharge is best when firing at an angle and slightly downward.
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