STS-121: The Mission in Pictures
Launch Day History
Making history with the first-ever launch on Independence Day, Space Shuttle Discovery rockets off the mobile launcher platform on Launch Pad 39B on mission STS-121. Despite the billowing clouds of smoke and steam, the tail masts can still be seen. To the left is the White Room at the end of the orbiter access arm, which is moved away from the orbiter 7 minutes, 24 seconds before launch. Click to enlarge.
Credit: NASA
   
 
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