While I agree with lots of stuff about this tragedy here's my thoughts , How do we stop this happening ,Let them know if anyone is involved with terrorism like this evil b s rd , their whole family will be sent back to their original home land , even if they blow themselves up ,when they've gone that their actions will have repercussions to their blood ,maybe they will have second thoughts .Yes some will say there home grown maybe so but their parents will be from other countries , SEND them back there and take all their money and houses ect off them . Severe yes but maybe just maybe they might think about their actions and maybe mum and dads won't turn a blind eye to radical thoughts .