World War Two for the day

Hitler looking at the Gustav Railway gun in 1942:

Amanda Macias has an article in The Business Insider about it:

Eager to invade France, Nazi leader Adolf Hitler demanded a new weapon that could easily pierce the concrete fortifications of the French Maginot Line, the only major physical barrier standing between him and the rest of western Europe.
In 1941, German steelmaker and arms manufacturer Krupp A.G. built Hitler the Gustav Gun, the largest gun ever used in combat, according to the Military Channel's Top Secret Weapons documentary.
The four-story, 155-foot-long gun, which weighs thirteen hundred tons, shot ten-thousand-pound shells from its mammoth hundred-foot tube.
Here's what the gun looked like when fired:

 

The massive weapon was presented to the Army free of charge, to show Krupp's contribution to the German war effort, according to historian C. Peter Chen.
In the spring of 1942, the Germans debuted the mighty Gustav at the Siege of Sevastopol. The 31-inch gun barrel fired three hundred shells on Sevastopol.
However, as they would soon find out, the ostentatious gun had some serious disadvantages:

Its size made it an easy target for Allied bombers.
Its weight meant that it could only be transported via a costly specialized railway (which had to be built in advance).
It required a crew of two thousand men to operate.
The five-part gun took four days to assemble in the field and hours to calibrate for a single shot.
It could only fire fourteen rounds a day.

Within a year, the Nazi's discontinued using the Gustav, and Chen notes that Allied forces eventually scrapped the massive weapon.

Rico says the Nazis thought big...