In 1956 a total of 12 editions of the Preventive Maintenance Monthly were published. The Preventive Maintenance Monthly is a series of United States Army technical bulletins that are published as a monthly magazine with comic book-style art to illustrate proper preventive maintenance methods (The magazine's title derives from its being a "postscript" to technical manuals and other published maintenance guidance).
A German torpedo hit the RMS Lusitania on May 7, 1915. Shortly after, a substantial second explosion shook the ship. Within 20 minutes, the vessel known as the "Greyhound of the Seas" had sunk to the ocean floor, resulting in the deaths of almost 1200 individuals. A new two-step investigation...