The Occupy movement targeted May Day as the day "the people of the planet will take to the streets." Crowds formed in many major cities, joining protesters worldwide on International Workers Day to demand economic equality.  But the day remained mostly peaceful. Promised stoppages of mass transportation and commerce by the Occupy movement largely fizzled across the country.

Overall, there were a modest number of arrests and clashes in a handful of cities. Many of the demonstrators reported splinter groups dressed mostly in black who turned demonstrations violent.

Here's a roundup of flashpoints in the United States: