A view of Howard Hughes installing a radar safety system for passenger planes in Culver City, California.

The black and white view of Howard Hughes' Lockheed 14 aircraft performing its final landing on the Round the World flight at Floyd Bennett Airport, New York. Typed onto a piece of paper attached to the image: "Landing completed - 7-14-38. (Daily News)."

From the Sister Klaryta Antoszewska Photograph Collection (PH-00352). The presentation slide reads, "Off-site radiation exposure review project organization chart"

From the Sister Klaryta Antoszewska Photograph Collection (PH-00352). The presentation slide lists the steps required to conduct atmospheric and underground bomb tests. 

From the Sister Klaryta Antoszewska Photograph Collection (PH-00352). The presentation slide title reads, "Nevada  operations office interagency relationships" 

From the Sister Klaryta Antoszewska Photograph Collection (PH-00352). The presentation slide title reads, "Comparative Radiation Exposures"

From the Sister Klaryta Antoszewska Photograph Collection (PH-00352). The presentation slide reads, "Total announced tests and radiation measured off the test range complex"