Interesting how in almost every recent atrocity, the terrorist conveniently leaves a passport in the vehicle and then is subsequently killed by police.   Wouldn't it be good to capture them alive to find out if they were lone wolves or sent by others?

A political scientiat at  the University of Chicago studied every suicide attack since 1980.  Here's his conclusion:

"What 95 percent of all suicide attacks have in common, since 1980, is not religion, but a specific strategic motivation to respond to a military intervention, often specifically a military occupation, of territory that the terrorists view as their homeland or prize greatly. From Lebanon and the West Bank in the 80s and 90s, to Iraq and Afghanistan, and up through the Paris suicide attacks we’ve just experienced in the last days, military intervention—and specifically when the military intervention is occupying territory—that’s what prompts suicide terrorism more than anything else."