Fact Sheet on U.S. "Constitution Free Zone" And MAP

Normally under the Fourth Amendment of the U.S. Constitution, the American people are not generally subject to random and arbitrary stops and searches.
The border, however, has always been an exception. There, the longstanding view is that the normal rules do not apply. For example the authorities do not need a warrant or probable cause to conduct a “routine search.”
But what is “the border”? According to the government, it is a 100-mile wide strip that wraps around the “external boundary” of the United States.

[link to www.aclu.org]

[link to www.aclu.org]