The correct answer to this open question is the following.
Werner von Siemens found a way to insulate telegraph wires effectively.
The electrical industry wouldn't be the same without the legacy of Werner von Siemens.
He designed the pointer telegraph and founded his telegraph construction company in 1847, in the city of Berlin. He was the man who discovered the dynamo-electric principle, opening the door for the following discoveries that made possible the use of electricity as a source of power. In 1889, he designed the first electric elevator for people. The man was a genius.
D-Day was so risky because it was delayed so many times and bad weather wasn't on their side. The allies were successful because they mange to take out the turrets on top and storm in to the Nazis place above
