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Launch Escape Systems (LES) come in two basic modes. Tractor and pusher. A tractor LES has the rockets atop and they pull the craft away.

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2 answers
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Has a pad abort ever been done on an actual launch?

In light of the recent SpaceX Dragon test, I was wondering if any pad aborts have ever been performed during an actual launch? To my limited knowledge, none have occurred, despite the Soyuz and Apollo …
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