Supreme Court Justice Ruth Bader Ginsburg has had a stent implanted to clear a blockage in her right coronary artery. A court spokeswoman says Ginsburg had some discomfort last night during routine exercise and was taken to the hospital. The 81-year-old Ginsburg had the procedure this morning after a coronary blockage was discovered. She's resting "comfortably," notes CNN, and is expected to leave MedStar Washington Hospital Center in the next 48 hours. (More heart surgery stories.)