I think that the next Photo sums up the whole problem: https://scontent-frt3-1.xx.fbcdn.net/hphotos-xtp1/t31.0-8/12238430_1078731138812925_4380062293678386790_o.jpg Left Side - A person participate in battles in the middle east. (Not a Nice Picture).Right Side- The same Person Already In europe. NSFW IMAGE - GRAPHIC VIOLENCE
Sky: Two of the blasts happened at entrances to the stadium and another at a nearby McDonald's restaurant, with Paris police later confirming two of the explosions were suicide attacks. So 2 of them tried to enter the stadium and blew themselves up there....
The first terrorist planned to blew himself in the stands, to create panic that would lead to mass killing. The Second Terrorist, waited outside the stadium for all the people that could run away from the first explosion inside.