The G20 summit was held in Pittsburgh. As can be expected, if the 20 most powerful people on the planet are all in one city making a big to do, people will flock from 100s of miles to protest in front of them.
I was working yesterday when all the good dangerous protests happened, but there was still a major police presence (and something of a protestor presence) downtown today. Something like that happens and you aren’t drawn there to capture it, you’re not a real photographer.