CNN The Lead With Jake Tapper May 13, 2015 20:52:00
Helicopters that are flying, they have jumpers on board. two per helicopter. these are air force personnel that if the helicopter is spotted, they can rope down into the most remote areas and try to recover the crew if only they could find them. a second night potentially out in the open. but the bottom-line answer is still no sign of the airplane no sign of the crew. and the very difficult news no one knows if it crashed and the fate of those on board. jake? >> barbara quickly, if you could, are there any prevailing theories about what may have caused this helicopter to go missing? >> reporte...