The airline industry is set to do better this year than initially thought. That's according to the International Air Transport Association - which revised its forecast higher to 3.2 billion euros in profits this year. BUT - it's not all smooth sailing for world's airlines. The I-A-T-A also warned that the industry is balancing on a knife-edge with profit margins that do not cover the cost of capital. Let's have a closer look at some of the challenges...