The Department of Homeland Security is a Cabinet position that was created in 2002, out of response to the terrorist attacks of September 11, 2001.
The technology that was ignored prior to the attack on the
Pearl Harbor was the radar. The reason that it was ignored during the attack
because of the fact that it wasn’t new or evolved and that it is still
considered to be experimental.
<em>Yes and nothing much would change—the discoveries he made and theories he devised would have materialized anyway sooner or later. </em>
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<em>Hope this helps! Have an amazing rest of your day :)</em>