Being allowed just one of your rights under the constitution is not being allowed all of them. If you're within 100 miles of a border, a US customs agent can by current law surpress your 4th amendment right. I did not mean to imply that you lost all constitutional protections in such zone, but the current government doesn't really care about constitutional intent or law and has punched all kinds of holes in it. Just see the current admins attempts to revoke the 14th amendment without an act of congress. Laws are messy. What it says on the tin is not garunteed to be what you're allowed, especially in our modern oligarchical republic.