We have a visa issued by the united states.. to get it you have to pay, then get an appointment, and then show them that you work and earn money (so they don't think you want to cross to get a job there)..
And it's not a dumb question, if you don't live in borders you don't know.. in fact last year we did a road trip to miami and a police officer stopped us in the road and he told my FI, why has this car crossed 150 times to the united states?? like it was a big deal hahaha it was only 150 'cause the car was relatively new..
he then understood that it was so normal 'cause sometimes it takes only minutes to cross..