Rockets are the only source f transportation that can with stand spaces atmosphere. As planes need air to fly and there is no oxygen or air in space, only low gravity.
Of Course!!! How else did they cross over the great wall of china??!!
I do agree with the above but also they could have walked ?Im not quite sure on the subject.
The US does not employ passports or visas within it's borders. Therefore one can travel all over the continental US using buses, automobiles, trains, planes, or motorcycles. The method is up to you.