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KENNEDY SPACE CENTER, FLA. - Space Shuttle Atlantis clears the lightning mast as it hurtles into the afternoon sky from Launch Pad 39B on mission STS-110. The mast is on the top of the Fixed Service Structure. Flames from the solid rocket booster look like an inverted torch. Liftoff occurred at 4:44:19 p.m. EDT (20:41:19 GMT). Carrying the S0 Integrated Truss Structure and Mobile Transporter, STS-110 is the 13th assembly flight to the International Space Station