On the morning of Tuesday, July 8, 1947, only a few hours prior to the Roswell base flying disk press release, acting AAF Chief of Staff Gen. Vandenberg met with the military Joint Research and Development Board (JRDB) for 2-1/2 hours. The successor Research and Development Board (RDB) was later implicated as housing a small, highly secretive group looking into the modus operandii of the flying saucers. Dr. Vannevar Bush headed JRDB and was later named in Top Secret Canadian documents as heading the secret UFO study group within RDB.
Note that the JRDB meeting replaced a previously scheduled meeting in Vandenberg's appointment book (compare handwritten appointment book with typewritten daily log). Vandenberg was briefed beforehand by Dr. Edward Bowles of MIT, a consultant to the Secretary of War, and Gen. Curtis LeMay, Vice-Chief of Staff of the AAF for Research and Development.
Afterwards, Vandenberg met with Secretary of the AAF, Stuart Symington for half an hour, one of numerous meetings Vandenberg had with Symington in the days surrounding the Roswell incident. While this by itself wouldn't be unusual, Symington was named by Brig General Arthur Exon, a former C/O of Wright-Patterson AFB, as being one of those who definitely would have been involved. Exon further stated, without qualification, that Roswell was the crash of an alien spacecraft, and he heard bodies had been recovered as well.
Exon was the highest ranking Air Force officer to go on record about the true unusual nature of the Roswell incident. His testimony was, of course, completely ignored in the 1995 Air Force Roswell report, as was that of Brig. Gen. Thomas Dubose, Gen. Ramey's Chief of Staff. Ironically, the Air Force debunkers did publish extracts of Vandenberg's appointment book and log, with the intention of showing Vandenberg had no connection with Roswell. Instead, the items document this seemingy hastily assembled and highly suspicious meeting with the JRDB on the day the Roswell story broke.