As we launch into this new era of human spaceflight and Artemis missions to the Moon, we must never forget the astronauts and others who gave their lives to further the cause of exploration and discovery. Spaceflight is inherently risky. This is why we test our systems exhaustively before putting astronauts in our spacecraft and rockets. NASA remembers the crews of Apollo 1, Challenger, and Columbia, and the ultimate sacrifice they made to advance space exploration. We, as an agency, must uphold their legacy by doing the best we can to stay vigilant and keep our crews safe. Image descriptions: 1. A wreath is placed in front of the Space Mirror Memorial at NASAKennedy Space Center Visitor Complex during the NASA Day of Remembrance on Jan. 27, 2022. The sky is blue with white clouds in the background. Credit: NASA/Kim Shiflett 2. Apollo 1 astronauts Virgil “Gus” Grissom, left, Edward White, and Roger Chaffee pose for photographers during a media event at Launch Complex 34. They ar...