Behind the dubious medical claims of Dr. Mehmet Oz and Deepak Chopra is a decades-long strategy to promote alternative medicine to the American public. Twenty-three years ago, the National Institutes of Health (NIH) began to investigate a wide variety of unconventional medical practices from around the world. Five-and-a-half billion dollars later, the NIH has found no cures for disease. But it has succeeded in bringing every kind of quackery — from faith healing to homeopathy — out of the shadows and into the heart of the American medical establishment.