Could this year be a time in history where certain extremists groups will be able to unleash a "Dirty Bomb" on cities throughout the world? Or a clandestine group masquerading as such? What is a "Dirty Bomb"? Dirty bomb - Wikipedia https://www.nrc.gov/reading-rm/doc-collections/fact-sheets/fs-dirty-bombs.html It would be hard to determine the make of such any dirty bomb, and made by whom. Whether it would be constructed to cause mass injuries and panic, or lasting problems is anyones guess over a large or small area. Certain groups may or try and manufacture mini dirty bombs, if may be easier to construct.