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 occurred in April 1981, early in President Ronald Reagan's first term. Reagan in 1982 announced a renewed active space effort, which included initiatives such as privatization of the Landsat program, a new commercialization policy for NASA, the construction of Space Station Freedom, and the military Strategic Defense Initiative. Late in his term as president, Reagan sought to increase NASA's budget by 30 percent. However, many of these initiatives would not be completed as planned. The January 1986 Space Shuttle Challenger disaster led to the Rogers Commission Report on the causes of the disaster, and the National Commission on Space report