10? >> we are still looking at that. >> reporter: suddenly, anything became possible. wild and intricate internet fieris fed fears of a terror plot led by two young iranians who boarded with stolen passports. the only problem, they weren't terrorists. just trying to begin new lives in europe. suspicions soon shifted to the only people capable of flying the boeing 777, the pilots. captain zaharie shah some suspected practiced the stealthy turns and changes in altitude on his om flight simulator, but investigation turned up nothing. no claim of responsibility. no known ties to terror groups among passengers or crew. no motive supported by evidence. intricate analysis of satellite handshakes took the search to an area where it likely ran out of fuel. with the plane, all evidence of what really happened on its flight data recorders.