Borman's medium Earth orbit lunar module test mission was now planned as Apollo 9, and tentatively scheduled for early 1969, after a low Earth orbit one commanded by McDivitt in December 1968. The crew assignments were officially announced on November 20, 1967, but in July 1968 Collins suffered a cervical disc herniation that required surgery to repair. He was replaced by Lovell in July 1968, reuniting Borman with his Gemini7 crewmate. When Apollo 8's LM-3 arrived at the KSC in June 1968, more than a hundred significant defects were discovered, leading Gilruth to conclude that there was no prospect of LM-3 being ready to fly in 1968.