No, in fact they are mandatory.
yes
Most American car horns beep in the note "F."
No. Just impractical in the US.
In some states in the US you can be fined.
You can purchase car horns online from the Auto Anything website. Once on the page, type "Car horn" into the search field at the top of the page and press enter to bring up the horns.
It is illegal to drive in any US state, to drive any car, if you do not have a driving license.
They enter the us with green cards or by ridding in someones car, or truck.
2 Horns located behind the radiator
American Cars horns beep in the tone of F
yes.
It is not illegal in US or many countries for someone to drive your car, except when the driver does not have a driving licence. The owner can be ticketed, if the car does not have valid registration, emissions and safety inspection done.
The export of rhinoceros horns is illegal. Anyone trying to export them would have to smuggle them somehow. Thus, rhinoceros horns are not declared with customs and nobody knows the answer to your question.