What is the test for reasonable detention under the Fourth Amendment?

"The Fourth Amendment protects against unreasonable searches and seizures. [Citations.] 'A detention is reasonable under the Fourth Amendment when the detaining officer can point to specific articulable facts that, considered in light of the totality of the circumstances, provide some objective manifestation that the person detained may be involved in criminal activity.' [Citation.] Ordinary traffic stops are treated as investigatory detentions for which the officer must be able to articulate specific facts justifying the suspicion that a crime is being committed. [Citations.] []... [] Law enforcement officers may 'draw on their own experience and specialized training to make inferences from and deductions about the cumulative information available to them that "might well elude an untrained person." [Citations.]' [Citation.]." (People v. Hernandez (2008) 45 Cal.4th 295, 299.)