Okay, they arrived before they left. I don't think that's possible anywhere except in politics. Kerry proved that with the now indisputable equation, 'I did before I didn't!'
There are reportedly 2-3 and maybe even 4 DIFFERENT ways to functionally travel 'faster than light' given point A say here and point B very, very far away.
One supposedly involves beinding the fabric of space time as a bowling ball would bend a large rubber sheet.
Another supposedly involves traversing through some other dimensions and popping back into this one very far away if measured only in this time space dimension.