Typed onto a piece of paper attached to the image: "At reception for World Fliers. Howard Hughes and Mayor Fiorello Laguardia seated in their parade car as Grover Whalen enters it just before the precession gets underway. 7/15/38."
From the Sister Klaryta Antoszewska Photograph Collection (PH-00352). The slide reads: "Comparison of the cumulative estimated dose with diagnostic x-rays 1951 to 1958.