About #EgyptAir

What happened today  when a man single handedly hijacked a country owned Airplane begs a lot of questions concerning security in Africa and the middle East. And i have mine to ask. First of all, how did he come into an airplane with explosives? If he actually did, how was he not caught before boarding?. Again, how could they keep speculating if he has an explosive device or not. Arent there devices that track explosives to know its capacity and the rest. Why was this not applied?. Why havent we gotten news of reinforcement in the airports? Why has nobody been held responsible for this?.
This should teach us all a lesson. Security should be improved, people should be more careful everywhere so that no single act that threatens a country (be it terrorists or somebody who is desperate) will be tolerated.