The last sentence from David Wells thoughtful column in the Australian e-bulletin of the Lowy Institute:http://www.lowyinterpreter.org/post/...Dol8CY.twitter

A "taster":
While lone actors or self-starters were certainly a concern, they typically struggled to build explosive devices or get access to weaponry without contacting known terrorist or criminal entities. Unfortunately, isolated actors and their cheerleaders overseas have realised this too. As Nice, Orlando and potentially Wurzburg all demonstrate, these unconnected individuals or networks are instead focusing on softer and typically more local targets. And utilising an attack methodology that challenges intelligence agency notions of what behaviour makes an individual 'look like a terrorist'. After all, possessing a knife or renting a truck is no obvious precursor to a terrorist attack.