First unmanned flight for Orion on SLS is scheduled for 2017 (remember that this upcoming launch is just an early test of just the capsule and not the new rocket system that it will eventually fly on).
First crewed mission is scheduled for 2021 in an Apollo 8 style circumlunar flight.
TBH although I'm excited for this launch it will only be real when Orion is flying on SLS, I'm sure we all remember the Ares 1 test flight...
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