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safety and security. Reasonable suspicion is required for a strip search and probable cause is
required for a body cavity search.
As a result of airline hijackings and terrorist bombings in the 1970s, travelers have to pass
through metal detectors before boarding airplanes. The U.S. Supreme Court, based on the
balancing test of Fourth Amendment reasonableness, has found that such searches are reasonable
without warrants or probable cause. These searches serve two extremely important special needs:
the security and safety of air travelers. Since September 11, 2001, these searches have become
more frequent and intrusive but so has the sense of urgency about security.
When an individual is in custody, the need for security and discipline increases while the
expectation of privacy decreases. Courts maintain that very prisoners retain few privacy rights,
but that rights are not lost altogether. Prisoners and their cells, prison visitors, prison employees,
parolees, probationers, and detained defendants prior to conviction can all be searched without a
warrant or probable cause.
The reasonableness of prisoner searches depends on balancing the need to maintain prison and
jail security, safety, and discipline against the invasion of prisoners’ substantially reduced
safety is to be met subsequent to their release.
Officials at public colleges and universities represent the public sector and are thereby
restricted in their abilities to infringe on privacy rights, but are afforded additional leeway due to
their need to preserve a safe atmosphere conducive to learning. Courts vary as to the value they
place on students’ right against unreasonable searches. Cases have adopted and blended three
tests are applied as a condition for students who enroll in school activities.