FRIDAY, AUG. 6 8:00 p.m. ET In a Tom Brokaw Reports: "Critical Condition," Brokaw looks at America's current healthcare system through the eyes of ordinary Americans who needed help, doctors and experts. As NBC News follows the personal stories of people coping with healthcare crisis, two themes emerge: the enormous strides the country has made in healthcare and the enormous burden the costs have become to hospitals, patients, employers and the tax-payer.