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eight

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seven

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six go for main engine start

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four three

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two

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one

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zero and liftoff of space shuttle

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endeavor expanding the international

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space station while creating a classroom

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houston now controlling the flight of

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endeavor the space shuttle begins its

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journey back into orbit

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endeavor rolling onto the proper

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alignment heads down wings level for the

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eight and a half minute ride to orbit

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taking aim on the international space

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thirty seconds into the flight the three

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liquid fuel main engines will soon

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throttle back to 72 percent of rated

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performance in the bucket to reduce the

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stress on the shuttle as it breaks

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this view

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from long-range trackers now from a

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camera on the external fuel tank showing

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the bird's eye view of endeavour heading

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54 seconds into the flight

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endeavor already eight miles downrange

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standing by for the throttle up call

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from capcom chris ferguson

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the throttle up call acknowledged by

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commander scott kelly joined on the

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flight deck by pilot charlie hobaugh

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flight engineer rick mastracchio and

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tracy caldwell

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dave williams aldrue and barbara morgan

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seated down on the mid-deck morgan

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racing toward space on the wings of a

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legacy

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one minute 30 seconds into the flight

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endeavor currently traveling almost 2

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000 miles an hour 14 miles in altitude

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15 miles downrange from the kennedy

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space center three good fuel cells three

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good auxiliary power units three good

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endeavour flying straight is an arrow

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one minute 55 seconds into the flight

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standing by for solid rocket booster

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booster officer confirms staging a good

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solid rocket booster separation guidance

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now converging

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endeavors on board computers commanding

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the main engine nozzles to gently swivel

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aiming endeavor for a precise keyhole in

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space for main engine cut off

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two minutes 25 seconds into the flight

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the propulsion officer reports the

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orbital maneuvering system engines have

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ignited providing endeavor with a kick

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in the pants for the next minute and a

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half assisting the shuttle and its crew

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on its climb to orbit

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endeavour 40 miles in altitude 59 miles

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downrange from the kennedy space center

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three minutes into the flight endeavors

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75 miles downrange

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traveling almost 4 000 miles an hour 47

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miles in altitude

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all of its systems looking good

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endeavour flying on the singular power

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of its three liquid fuel main engines

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draining a half a ton of fuel per second

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seven and a half minutes into the flight

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the main engine soon will throttle down

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to

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limit the stress on the shuttle and its

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seven crew members to that of three

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times the effect of gravity endeavor

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currently traveling more than four miles

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per second at the time of main engine

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cutoff endeavor will enter its

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preliminary orbit at a speed of five

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endeavour currently traveling at

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15 000 miles an hour

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20 seconds of powered flight remaining

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standing by for main engine cut off

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which will be followed a few seconds

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later by the separation of the external

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booster officer confirms main engine

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cutoff

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external tank separation confirmed

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endeavour now in its preliminary orbit