Aortic dissection: The medical emergency linked to Lindsey Graham’s death

By Deidre McPhillips, CNN (CNN) — US Sen. Lindsey Graham, a Republican from South Carolina, died on Saturday night from a tear in his artery, according to preliminary findings from a medical examiner. Aortic dissection is rare, and life-threatening in most cases, experts say. The acute event happens quickly but there are steps you can