Medical devices are something of an orphan sister to the glamour of drugs, but they include some of the genuine miracles of modern medicine: pacemakers, artificial joints, cardiac stents, scanners and radiotherapy machines. The United States currently is the global leader in medical device innovation, and it is one of the few major industries that both boasts a net trade surplus and is a job-creator. The sector employs 400,000 Americans directly and is indirectly responsible for almost 2 million more that supply and support the highly skilled workforce.