On March 17 , Occupy Wall Street demonstrators gathered for their Six month anniversary, where people re-occupied Zuccotti Park. This footage begins around 9 O'clock p.m.,and shows the gathering that took place along with many of the arrests.
The NYPD orders all to evacuate in order for the park to be "cleaned". Many stayed and were then arrested. Here are those events. Wonderful music by Ignacio Nunez, the song is called La cajita de musica.