On March 28, 1963 NASA launched the first stage booster of its new Saturn 1 rocket on a fourth and final test flight. ‘On This Day in Space’➡️ https://space-com.visitlink.me/Sn_fYA This uncrewed suborbital flight helped pave the way for astronauts to launch to the moon. After this initial test phase, NASA started launching test flights with a live second stage and boilerplate versions of the Apollo Command/Service Module. This test flight, designated SA-4, carried a dummy second stage to test th