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4 [[circled]] [[arrow right]] PRESSURES ON THE SYSTEM (launch on time ; become operational) [[arrow down]] built up 24 hrs before launch SEQ of MTGS & DECISIONS COLD [[triangular dot pattern]] everyone & re-evaluate system THIOROL [[?]] had concerns ; called teleconference (~ 8:30 pm, before 11:30 am launch) THIOROL [[?]] RECOMMENDED NOT TO LAUNCH (WRITTEN CHARTS) 1 [[circled]] previous problems 2 [[circled]] exacerbated by T 3 [[circled]] this T, totally unknown [[arrow right]] don't launch below 53 degrees F MSFC managers Never made it & NASA managers (didn't even know there was a concern) MEETING: usually [[arrow right]] PROVE ITS SAFE here [[arrow right]] PROVE ITS NOT SAFE OPERATED TOTALLY OUTSIDE TEST BASE LAUNCH COMMIT CRITERIA: [40-90]