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On 28 JAN ~ 5 am PST?, Petrone [[arrow to right]] support room in Downey. Engineers concerned about ice. Tile experts saw some falling (on west side of pad) & wind from west (VAB). They were concerned about debris (ice) on pad, being broken up & sucked up to hit orbiter (tile damage/cracks) [ice team normally sweeps pad to remove all debris]. Rocco NO-GO: "unknown situation - like playing Russian roullette..."

RI VP's @ KSC went to 9 am EST mtg (as they were going, Moser called Rocco's ass't - heard NO GO). VP's said "RI can't assure safety of flight." Moser then implied he had a different story from Downey (he didn't) .... & Arnie's group said GO.