with this week's health for her, i'm elizabeth cowen. >>> now making a difference.d in the world for everyone. so why are so many people dying? scarlett johannson has this week's impact your world. >> hi, i'm scar let johansson. you, too, can impact east africa. how are you? this first struck by the mass of it. the largest refugee camp in the world. people are just surviving. basically i was there as an ambassador to hopefully highlight not only the crisis but also to highlight all of the work that oxfam is doing and what they're providing for people. it doesn't need to be this way. there is enough food in the world to feed everyone. join the movement. impact your world. go to cnn.com/impact. >> and you can learn more about oxfam by logging on to cnn.com/impact. an airline's job, is to take you from where you are... to where you need to be. and we're not just talking about points on a map. with a more intuitive delta website and mobile app... and the most wifi equipped planes. we let you be everywhere at once. innovations like these are extending our reach so you ca