And another question. Why is it impossible for us to make it more difficult for Terrorists obtain weapons of war?

An interesting portrait of the Orlando killer is emerging.
Apparently Mateen pledged allegiance to several terrorist organizations/figures, some whom are at war with each other. I guess that he was not a careful student of ideology.
In past attacks, a portrait emerged of "quiet" individuals who became radicalized and then committed violence.

Mateen on the other hand seems to have had a long history - perhaps all the way back to grade school - of anger management issues and violent acts. It is almost as if he embraced radical Islam as a pretext to commit the violent acts he wanted to commit all his life.

It appears as if terrorists come in more than one shape and side.