The Boeing Company also provides eligible employees with an opportunity to enroll in a variety of benefit programs, generally including health insurance, flexible spending accounts, health savings accounts, retirement savings plans, life and disability insurance programs, and a number of programs that provide for both paid and unpaid time away from work. Test capabilities within the Environmental labs include vibrational/structural dynamics, acoustic, airflow systems, fuel flow systems, high temperature flow impingement, and environmental control chambers, where temperature, humidity, and pressure are varied.