Saw this story today. Found it interesting. Worth a read. https://www.washingtonpost.com/local/after-pearl-harbor-this-mail-plane-had-a-new-mission-find-the-attackers/2016/12/01/34216070-a1f5-11e6-a44d-cc2898cfab06_story.html?tid=hybrid_collaborative_1_na&utm_term=.60105da6051d