The deafening blast and the blinding flash of a roadside bomb might be the last thing the soldiers and Marines can recall before awakening in a bed at Brooke Army Medical Center in San Antonio. And when they turn to either side in that hospital bed, the first thing they are likely to see is a Purple Heart embroidered on their pillow. They won't know it, but they have Ken Hunter, a retired pharmacist in Burleson, to thank. The Purple Heart is the nation's oldest military decoration. It was created by George Washington and is given to GIs wounded or...