Stop-and-frisk is a controversial police policy instituted in 1968 that allows the police to stop and detain a person based on "reasonable" suspicion. If the police "reasonably" suspect the person is armed and dangerous, they may also frisk him or her for weapons.  Stop-and-frisk reports are at an all time high for black men in major urban areas like New York and Philadelphia even though they result in arrest rates of less than 10%.