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WASHINGTON, Feb. 1 — “Three, two, one, we have booster ignition and liftoff of space shuttle Columbia.” That was Jan. 16th, when Columbia lifted off with its seven astronauts, five men and two women. The crew was on science mission with 80-plus experiments. As with most missions now, few Americans paid much attention until Saturday morning, when the clock started ticking on what would be a national tragedy.
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CAPE CANAVERAL, Fla., Feb. 2 — Countless clues left investigators with few answers Sunday as they probed what caused the breakup of space shuttle Columbia after the deadly disaster spewed debris across hundreds of miles. Officials focused immediately on the possibility that a piece of debris damaged thermal tiles on the shuttle’s left wing during liftoff far more seriously than NASA realized.