Launch
Start readingDespite poor visibility at the Cape causing nearly an hour of holds, Mercury 7 had the smoothest pre-flight countdown to date of NASA's crewed missions, lifting off at 7.45am.
Activity
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![Frequency of lines in Launch](/assets/missions/ma7/images/stats/graph_ma7_0.6b9f7edc2f46.png)
Despite poor visibility at the Cape causing nearly an hour of holds, Mercury 7 had the smoothest pre-flight countdown to date of NASA's crewed missions, lifting off at 7.45am.
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