I'd like a variable differential gravity field that pulls on different parts with different intensities. It's be a great stretching massage as long as one avoids the Roche Limit (http://en.wikipedia.org/wiki/Roche_limit).
The requirement for a passport at all US borders is an issue local commerce between Washington State and Canada, and the new driver's license is less expensive then a passport, but what "other" costs will it create?"They will look much like conventional driver's licenses, but will be loaded with proof of citizenship and other information that can be easily scanned at the border."
Going the speed of light is bad for your age.