i m going to guess those aren t decorative fireworks. maybe you have fourth of july of your brain. i think that s perhaps law enforcement as you point out, some sort of flash bang or something set up in the sky. reporter: unclear, though. it looks like they re coming from more of a rooftop angle so it s not the yellow it s not the orange tear gas we saw earlier from the flash bangs. it is different than that. so again, it s dissipating, and again, we should point out, still relatively peaceful as far as these protests go. jeff zeleny, thank you. from hamburg, still light out, nearly 9:00 at night. i think the sun doesn t even set there until around 10:00. let s talk more substance as we pivot back and forth between the pictures of these protests and these all-important world leader meetings. i have standing by matt, author of angela merkel, europe s most influential leader and political science professor at