Hanger, Inc. provides prosthetic and orthotic products and patient care services in the United States. The company has more than 700 patient care clinics located in 45 states and the District of Columbia. More than 1 million patients visit these clinics each year. Hanger Clinic operates under the corporate umbrella of Hanger, Inc., headquartered in Austin, Texas (formerly Bethesda, Maryland). According to the company's 2007 annual report, the patient care market for prosthetic and orthotic services in the United States is estimated at $2.5 billion annually. Hanger Clinic represents about 25 percent of this market. Hanger, Inc. employs about 4,700 people, including more than 1,080 prosthetic and orthotic clinicians.Notable Hanger patients include: Jeremy Campbell, winner of two gold medals in the 2008 Paralympic Games, and world-record holder for the Pentathlon P44 Retired Staff Sgt. Heath Calhoun, veteran of the Iraq War, spokesperson for the Wounded Warrior Project, and key advocate in the passage of federal Traumatic Injury Protection (TSGLI) payments to assist wounded American soldiers and their families.Aron Ralston, a mountain climber who became famous in May 2003 when he amputated his lower right arm with a dull knife in order to free himself from a fallen boulder; his story is featured in the 2010 movie 127 Hours.Warren Macdonald, an Australian mountain climber who lost both legs after a giant boulder fell on him. His story is told in his autobiography, A Test of Will, and in Discovery Channel's program I Shouldn't Be Alive.Winter, a bottlenose dolphin who lost her tail in a crab trap; her story is featured in the 2009 book Winter’s Tail: How One Little Dolphin Learned to Swim Again and in the 2011 movie Dolphin Tale.