    Seriténce 1: Without the fleet’; NASA has #elied onthe  Russian space program to rotate crew’ members for the  Internationat Space:Statian and to send supplies. to the  orbiting laboratory .,    Sentence 2: Without the shuttle fleet ,, NASA is relyinig  on.the Russian, space program to’rotate crew members  on, the. international Space Station and” send -riew  supplies, to.the orbiting laboratory .