Now Playing: 11-21-12 Marketplace Tech Report

24 million people are expected to board airplanes this week, and all relying on complex computer systems to keep everything sorted out. As United Airlines combines with Continental, it has been struggling with its computer foul ups, including one last week that delayed more than 600 flights. If you think about it, flying is like factory logistics: everyone's hoping for just-in-time delivery. The widget you hope gets there "just in time" is yourself.