Terrorists from the Al-Qaeda and IS have both claimed responsibility for this. How can it be both? It seems to me, they both want attention. Oh, it's there all right!
They're both Islam {Muslim} who cares. Oust all incoming Muslims from entering the US. and once and for all take out all countries giving refuge and allowing terrorist training camps to operate within their country. When will a prez. ever have the cojones to do what should have been done years ago. Controlled nuke response. In the name of saving 10's of thousands of innocent lives of woman and children in the future, which everyone knows is inevitable.
It is the ONLY way they know of. They have nothing else. What do they stand for? Why do they do it? They cannot explain much to even their own kind; how can they explain unbridled hatred when they don't even have a rhyme or reason for the cause?
Most guerrilla warfare goes down the tubes just like any criminals in a band. If there is not a strong leader and a cause that makes sense and gains momentum because it has a valid reason? It soon falls by the wayside as dissention and starvation takes over. Since they have to hide and depend on backers, when those backers stop backing them, they have to Cry and BOMB something.
This display of bravado and POWER attracts the other pigs on earth that can use them as slaves for their own cause.