Depends on the effects, one time theory I saw recently held that altering time was like a ripple or earthquake. The further you get away from the change the less effect you have.
So just going back in time wouldn't stop 9/11.
Depends on the effects, one time theory I saw recently held that altering time was like a ripple or earthquake. The further you get away from the change the less effect you have.
So just going back in time wouldn't stop 9/11.