Steel Doors vs. 2x4's -- What happens when a 2x4 hits your steel door at 74mph?

See what happens, in slow motion, as 2x4's are launched at 74mph through
a "regular" steel door one would purchase for their home. Category 1
hurricane strength.

Then watch as a double plated security door is matched against strong
storm force wind driven debris at 144mph. Category 2-3 hurricane
strength.