jack hickey, john kimball, thank you, we appreciate it. >> pleasure. >> thank you, pamela. still to come, search crews are desperately trying to find wreckage from missing malaysian airlines flight 370. so far a high-tech robot scouring the ocean floor hasn't come back to the surface with a single lead. cnn's erin mclaughlin has the latest from perth, australia. >> reporter: hi, pamela. the under water robot has scanned two-thirds of this narrow search area. still no signs of missing malaysian flight 370 prompting many to ask what next. i'll have more on that after the break.