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10 FEB (DC - closed. on SRB's) (all but WHEELAN, RUMMEL) GRAHAM: NASA internal memo to cooperate, &/or correct any inconsistent testimony. Turning over documents on SRB seals & O-rings. *does briefing include thermal info on O-ring? MOORE: intro. Looking at several scenarios, not just O-ring erosion [[in bracket]] DAVE WINTERHALTER - PROP in Jesse's office [[in same bracket]] WENTZEL - SRB's at HQ *ALAN MCDONALD - THIOKOL DON KETNER - THIOKOL, gas dynamics WEEKS (!) [[bullet point]] changed manufacturers on putty on ST3-8. Putty is thermal barrier, not sealant 29 APR [[bullet point]] 51B - only with secondary sealant problem. (51C - primary problem)