Space Shuttle Solid Rocket Booster design or replacing them altogether with liquid "flyback" boosters using either Atlas V or Delta IV EELV technologies. The 5-segment SRB, which would have required little change to the current shuttle infrastructure, would have allowed the space shuttle to carry an additional of payload in an International Space Station-inclination orbit, eliminate the dangerous "Return-to-Launch Site" (RTLS) and "Trans-Oceanic Abort" (TAL) modes, and, by using a so-called "dog-leg maneuver", fly south-to-north polar orbiting flights from Kennedy Space Center. After the destruction of "Columbia", NASA shelved the five-segment SRB for the Shuttle Program, and the three surviving Orbiters, "Discovery", "Atlantis", and "Endeavour"
Space policy of the United States DARPA. NASA also took over the US manned satellite program, Man In Space Soonest, from the Air Force, as Project Mercury. Early in John F. Kennedy's presidency, he was inclined to dismantle plans for the Apollo program, which he had opposed as a senator, but postponed any decision out of deference to his vice president whom he had appointed chairman of the National Advisory Space Council and who strongly supported NASA due to its Texas location. This changed with his January 1961 State of the Union address, when he suggested international cooperation in space. In response to the flight of