WHITFIELD: Tighter security measures are going into effect at Paris' Charles de Gaulle airport as the investigation as to what happened to EgyptAir flight 804 continues. The flight took off from Paris late Wednesday night before disappearing other the Mediterranean by Thursday morning. Since then, questions have pour about security measures at that airport and who may have had access to the plane before it took off. Egyptian investigators are focusing on the theory that a terror attack possibly brought down the plane but so far no one has claimed responsibility. And despite that, homeland security secretary Jeh Johnson said officials are not ruling anything out.</s>JEH JOHNSON, HOMELAND SECURITY SECRETARY: Early in the investigation at this point, we do not rule out an act of terrorism but it's still early and there's a lot still unfolding. I think we'll know a lot more at some point in the next couple of days.</s>WHITFIELD: CNN's Atika Shubert is live in Paris at Charles de Gaulle airport. So Atika, what is the latest on the security measures there?</s>SHUBERT: Well, they are stepping up measures. Specifically, they are bringing in 30 extra intelligence agents that will be operating here very soon. That's on top of the 5,700 security officers that they already have here. And if you ever come through Charles de Gaulle airport, you will see them. You see armed officers patrolling inside the terminals, spot checks on passengers and that doesn't even count what's happening behind the scenes with personnel. have to go through the same stringent security checks we do when we board a flight checking for liquids and laptops and so forth. All the personal items are checked. Their personal lockers are checked. So there is a lot of extra security. The big question being asked, is it enough especially with those personnel that have access to the plane -- Fredricka.</s>WHITFIELD: Atika Shubert, thanks so much in Paris. All right, still ahead here in the U.S., Bernie Sanders saying today that maybe the superdelegates should go.</s>SANDERS: Clearly the current situation is undemocratic and it is ill- advised and it needs to change.
Security Ratched Up at Paris Airports