sentences:  This includes an expanded Emergency Department and Mission Regional Trauma Center as well as a new Cancer Institute.Mission Hospital in Mission Viejo also completed in 2009 the purchase of Laguna Beach Community Hospital, which is now Mission Hospital Laguna Beach.The new tower has external "X" beams incorporated into the exterior architecture for earthquake compliance, and this makes it possible for the patient rooms to have nearly wall-size windows, which is proven to aid in healing, by promoting the body's natural "circadian rhythm" (day–night cycle).