What fledging technology was ignored prior to the attack on pearly harbor? why was it ignored?

Radar and its use to detect the incoming Japanese planes were ignored prior to the attack on Pearl Harbor. It was ignored because it was relatively new and untried as well has known to have glitches in the systems.

its b wells tried to fight lynching in the south by

martin luther believed that selling indulgences was wrong and gave people a license to sin. the roman catholic church used the practice of indulgences to raise money for major building projects.