I suspect that Worlds will go on without any international incidents -- beyond any antics by competitors, judges, coaches, "Speedy" etc.
Last year's worlds went on in Washington DC during the invasion of Iraq. In fact, we were invading Iraq when I was boarding the bus to DC last year. Besides changing where I stayed (who wanted to be out near an Air Force base in the middle of an international invasion?), the worlds experience was OK.
Here's to a worlds without terror....