Library of Congress. Congressional Research Service.
Abstract
The attacks of September 11, 2001, have increased interest in the authority
under statute to detain noncitizens (aliens) in the United States. Under the law there
is broad authority to detain aliens while awaiting a determination of whether the
noncitizen should be removed from the United States. The law also mandates that
certain categories of aliens are subject to mandatory detention (i.e., the aliens must
be detained)
