Mardi Gras riot, 2001

Philadelphia Police officers charge down South Street on horseback in an effort to break up the crowd after violence broke out during Mardi Gras celebrations in 2001.

A crowd of 40-50,000 had gathered, some businesses were looted and around 100 people were arrested, according to a PhillyMag recap a couple of years ago.

Back in 2001, The New York Times reported that Mardi Gras violence had also broken out in Austin, Fresno and Seattle.