Original sentence: In the days and weeks following the September 11, 2001 terrorist attacks, Union Square became a primary public gathering point for mourners.People created spontaneous candle and photograph memorials in the parl and vigils held to honor the victims.The park has historically been the start or the end point for many political demonstrations
Edited sentence: Another example is the monthly Critical Mass ride that meets here on the last Friday of every month.For example, in homage to Cindy Sheehan's Camp Casey, a group of anti-war activists maintained a 24/7 "Camp Casey NYC" distributing anti-war literature, stickers, and the like, despite a few temporary "evictions" by the police.In the days and weeks following the September 11, 2001 terrorist attacks, Union Square became a primary public gathering point for mourners and activists.People created spontaneous candle and photograph memorials in Union Square, and the park was the setting for vigils held to honor the victims of the attacks and for efforts to assist workers and rescuers at the World Trade Center site.The park is also the starting point for many political demonstrations, including, of particular recent note, the 2004 Republican National Convention protest activity