we'll go straight to the source on that. >> as soon as it hits the water it starts pinging. it's designed that way. >> also ahead i want to take you back into the simulator to explore this idea the 777 was on a course to deliberately avoid radar coverage. does that automatically mean that there was a human at the controls of this plane? we'll be right back. i dbefore i dosearch any projects on my home. i love my contractor, and i am so thankful to angie's list for bringing us together. find out why more than two million members count on angie's list. angie's list -- reviews you can trust. ameriprise asked people a simple question: can you keep your lifestyle in retirement? i don't want to think about the alternative. i don't even know how to answer that. i mean, no one knows how long their money is going to last. i try not to worry, but you worry.