Coronary heart disease affects blood vessels that supply the heart and can lead to a sudden heart attack, instant death

Tim Russert, a major figure in U.S. journalism, was memorialized on June 18.  He died June 13 from a heart attack. The official cause of his death: coronary artery disease, a major killer in wealthy countries. It is also increasing in the developing world. VOA's Carol Pearson has more.