Who was the first man to travel into outer space twice?

The statement that Gus Grissom was the first man to travel into outer space twice is incorrect. Gus Grissom, along with fellow astronauts Edward White and Roger Chaffee, tragically lost their lives in the Apollo 1 fire on January 27, 1967, during a pre-launch test. Therefore, he was unable to make a second journey into outer space. The first man to travel into outer space twice was Soviet cosmonaut Gherman Titov. He became the second person to orbit the Earth on August 6, 1961, aboard Vostok 2, just four months after Yuri Gagarin's groundbreaking flight. Then, Titov went on to participate in the Soyuz 9 mission in 1970, spending a record-breaking 18 days in space.