The Messerschmitt Me 262. It was the first operational jet fighter aircraft. It was much better armed and faster than its British competitor, the Gloster Meteor. One of the down sides to this 542 Allied killing machine is that its engine was not reliable and it was attacked before it was airborne. Thanks to the Me 262 it influenced the design of North American F-86 Sabre and Boeing B-47 Stratojet. The Me 262, the first jet fighter aircraft helped shape warfare as we know today.
The V1 & V2 Rockets. The thought of them raining on your home and debris and shrapnel flying everywhere! It was a nightmare. But who knew the would develop into a human achievement. Like putting man on the moon. Yes. The scientists who were involved in the creation and development of the V-Rockets were brought to America; not all but a few. Thanks to them we have: Space Shuttles, Space Stations, Unmanned Space Rovers!