other things. so it is very concerning. >> a lot of travellers this weekend. for the memorial day holiday. bottom line how worried should they be? >> well, at this point you know it is no more worrisome than it ever was. and that is probably not very comforting for people to hear. but nonetheless it is important to remember that on board each aircraft they have collision-prevention systems. what it tells the pilot if he is in danger and they will take care of it. and make the corrective action. >> well, let's hope nothing untoward happens. >> up next, the couple who escaped the costa concordia but could not escape the emotional toll. also, how a hiker escaped death and climbed to what could have been an icy death.