Charlie Rose plans to take a few weeks off from "CBS This Morning" as he prepares to undergo heart surgery on Thursday. The 75-year-old anchor told CBS staff that it is a voluntary decision to replace an artificial aorta valve from 15 years ago. Rose is expected to go back to work sometime in March. “I can’t wait to be back completely rested with my heart recharged, my passion for the work ahead purposeful and my joy at life’s pleasures high,” Rose wrote in a letter.