The big one is Saturday, but protest of Donald Trump’s inauguration began Thursday evening outside the DeploraBall (which is what it sounds like—Trump supporters celebrating their own ugliness of spirit) and continued Friday morning around the city. At one checkpoint, protesters tied themselves together and blocked the entrance:

“Hey, hey, ho, ho! Donald Trump has to go!” the group of about 100 mostly young protesters. “End white supremacy!” Armed with signs, brass instruments and life-size wooden crosses, the assembly danced, blew whistles and sang peacefully along with a small marching band. The protest continued until a large group of inauguration attendees — many dressed in suits and dress clothes — tried to push through the human barricade. People starting falling to the ground and swearing until police officers helped create a lane for the attendees to pass through.

Similar blockades were happening at other checkpoints. The group DisruptJ20 is promising to attempt to shut down inauguration celebrations. Earlier in the month, right-wing fake video maker James O’Keefe was caught on tape trying to pay protesters to riot, opening the concern that O’Keefe or his imitators might act as provocateurs during the protests. But there are—obviously—plenty of sincere protesters ready to block and disrupt where they can.