Your U.S. passport must be valid in order to re-enter the U.S.
Your passport must be valid to re-enter the U.S.
You cannot travel back in time.
Time travel isn't possible.
air travel- - - - but if you wanted to take a look at a good sceneries then perhaps take a train.
Moving back and forth in time is called time travel.
Time travel.
Not currently.
no way! if people cant time travel now how do u expect them to do it back then!
Because time travel is a complicated procedure that always contradicts itself.
you can't travil back in time
You cannot travel backwards in time
Unfortunately, the ability to travel back in time is not currently possible. It is unknown to us what time travel requires, be it speed, distance, location, or what is capable of making the trip, if such a trip is even possible.
back to the future, doctor who, and time squad the animated series