https://www.history.com/this-day-in-history/operation-corncob-is-launched-while-hitler-celebrates-his-birthday?cmpid=email-hist-tdih-2021-0 [login to see] 1&om_rid=
On April 20, 1945, Allied bombers in Italy begin a three-day attack on the bridges over the rivers Adige and Brenta to cut off German lines of retreat on the peninsula. Meanwhile, Adolf Hitler celebrates his 56th birthday as a Gestapo reign of terror results in the hanging of 20 Russian prisoners of war and 20 Jewish children: Of these, at least nine are under the age of 12. All of the victims had been taken from Auschwitz to Neuengamme, the place of execution, for the purpose of medical experimentation.