<qa>  What is the purpose of the study?The purpose of the study is to test the effect of a sleep disorders detection and treatment program for police officers on their safety, quality of life, and job performance. The program is called Operation Healthy Sleep. We will develop and test a sleep health detection and treatment program that we aim to apply nationwide to reduce police officer fatigue and stress; enhance the ability of officers and their families to cope with police work; improve the health, safety and performance of law enforcement officers; and thereby improve public safety. Part of this program will include a questionnaire asking about about work hours and health related issues. We will then look at how these survey data relate with data on police officer safety and job performance that we are collecting through police departments databases. 