Source for the calls for an attack back in May?
This could develop into a very interesting narrative.
ISIS called for a lone wolf attack on the Las Vegas Strip in a chilling call to arms video released in May
From Fox News on May 25th:
And, from Channel 8 in Las Vegas:
http://www.lasvegasnow.com/news/new-isis-video-appears-to-threaten-las-vegas/493629912