you have an acars system being turned off. you have the plane being turned not once but at least twice probably three times. >> and most perplexing, no distress call. >> there are so many ways to notify people that there's a distress. uhf, vhf radio, many, many, many ways. >> none of that happened. >> none of that for seven hours. >> could it have been deliberate? to answer that question investigators zero in on the last two men known to be in control of the plane. seen here passing through security on the night of the flight. first officer fariq hamid was only 27 years old. >> very young to be flying a 777 in the u.s., but had gone through all the gates and had passed and was with a very senior guy. that's a perfectly safe scenario. >> there were these 2011 photos taken of fariq in the cockpit with two passengers that