DNA samples could be useful in a number of areas, as a reliable method of identifying people. The military, as an employer, takes DNA samples of all personnel to use in identifying remains. The states and the federal government have passed laws setting up DNA databases to use in solving crimes. All states and the federal government require at least some convicted felons to submit DNA samples to their databases. The federal government has the authority to take DNA samples from some persons merely arrested or detained. The courts have almost uniformly upheld the legality of requiring DNA samples from criminals. Many employers who need to be sure their employees are law abiding, such as those providing security services or dealing with large sums of cash, might want to have prospective employees provide a DNA sample to make sure they are not convicted felons. Just as the military wants to have DNA samples to help in identifying remains, employers of employees involved in hazardous occupations, such as firefighters, pilots, and demolition workers, would have an interest in having DNA samples for identification purposes.