Past Projects P-40B Warhawk Fighter B-18 Bolo Bomber Underground WWII Luftwaffe Hangars Lake Michigan Surveys P-47 Thunderbolt Fighter The Bonin Trench Expedition General Media Mentions P-40B Warhawk Fighter B-18 Bolo Bomber Underground WWII Luftwaffe Hangars Lake Michigan Surveys P-47 Thunderbolt Fighter The Bonin Trench Expedition General Media Mentions Curtiss P-40B Recovered Mystery in the Koolaus