Werner von Braun was a German-American aerospace engineer and space architect, born on March 23, 1912. He is best known for his pivotal role in developing the V-2 rocket during World War II and later for his contributions to the Apollo program, which successfully landed humans on the Moon. After the war, von Braun moved to the United States, where he became a key figure in the NASA space program. His work helped advance rocket technology and space exploration, leading to significant milestones, including the launch of the Saturn V rocket, which was instrumental in the Apollo 11 mission.