>> still to come, the u.s. says an aircraft carrier, south of the china sea. >> we will show you how china is reacting. >> live from atlanta to viewers across the united states and around the world, this is "cnn newsroom." and my life is basketball.west, but that doesn't stop my afib from leaving me at a higher risk of stroke. that'd be devastating. i took warfarin for over 15 years. until i learned more about once-daily xarelto®... a latest-generation blood thinner. then i made the switch. xarelto® significantly lowers the risk of stroke in people with afib not caused by a heart valve problem. it has similar effectiveness to warfarin. warfarin interferes with vitamin k and at least six blood-clotting factors. xarelto® is selective. targeting one critical factor of your body's natural clotting function. for people with afib currently well-managed on warfarin, there is limited information on how xarelto® and warfarin compare in reducing the risk of stroke.