US tourism

If you’re traveling to the US from Europe, you can enter without a prearranged visa via the Visa Waiver Program.

However, if you plan to do so, then it’s worth noting that US authorities reserve the right to put you in shackles and throw you in a jail for 10 days, based on nothing more than a “hunch”.

This is not a theoretical right, it’s one they’ve happily made use of.