Countdown WeekShuttle Countdown T-0 Launch Day: A Tribute to AtlantisBy Helene McLaughlinSpace Shuttle Countdown: A Tribute To Roberta Lynn Bondar And Julie Payette: Canada's Female AstronautsBy JulesShuttle Countdown T Minus 2 Days: A Tribute to ColumbiaBy Helene McLaughlinShuttle Countdown T-5 Days: A Tribute to EndeavourBy Helene McLaughlinChrista McAuliffe - Teacher, Astronaut, HeroBy Nicole WakelinShuttle Countdown T-7 Days: A Tribute to DiscoveryBy Helene McLaughlinGeekMom Memories of the Challenger DisasterBy Helene McLaughlinShuttle Countdown T-9 Days: A Tribute to ChallengerBy Helene McLaughlinLet the Countdown Begin: T-10 daysBy Helene McLaughlin