Navy Secretary Frank Knox on inspection tour to heighten anti-submarine defenses. July 19, 1942 in Charleston, SC. L-R: Lt. Cmdr. M.W. Greenough; Frank Knox; Rear Adm. William Glassford; and Rear Adm. Richard S. Edwards U.S. Navy, Deputy Chief of Staff. (CSU 2015 7 368)

- Image ID: F2B2EY
Navy Secretary Frank Knox on inspection tour to heighten anti-submarine defenses. July 19, 1942 in Charleston, SC. L-R: Lt. Cmdr. M.W. Greenough; Frank Knox; Rear Adm. William Glassford; and Rear Adm. Richard S. Edwards U.S. Navy, Deputy Chief of Staff. (CSU 2015 7 368)
Everett Collection Historical / Alamy Stock Photo
Image ID: F2B2EY
Navy Secretary Frank Knox on inspection tour to heighten anti-submarine defenses. July 19, 1942 in Charleston, SC. L-R: Lt. Cmdr. M.W. Greenough; Frank Knox; Rear Adm. William Glassford; and Rear Adm. Richard S. Edwards U.S. Navy, Deputy Chief of Staff. (CSU_2015_7_368)