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"
British space programme Peter Longhurst (born in Staines, Middlesex) and RAF Squadron Leader Nigel Wood (born in York) were selected in February 1984 as payload specialists for the Skynet 4 Programme, intended for launch using the Space Shuttle. Boyle resigned from the programme in July 1984 due to Army commitments. Prior to the cancellation of the missions after the Challenger disaster, Wood was due to fly aboard Shuttle mission STS-61-H in 1986 (with Farrimond serving as his back-up) and Longhurst was due to fly aboard Shuttle mission STS-71-C in 1987 (with Holmes serving as back-up). All resigned in 1986, having not flown. Army