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