What's a/the purge?
The Purge is a 2013 American science fiction thriller film directed and written by James DeMonaco. Starring Ethan Hawke and Lena Headey, the film is set in the year 2022 when the United States has become "a nation reborn," with crime and unemployment rates hitting an all-time low, due to the government having instituted an annual 12-hour period called "the Purge" during which all criminal activity (including murder, theft, and rape) becomes legal. The only rules during the Purge is that government officials of "ranking 10 or higher" must remain unharmed and usage of weaponry above "Class 4" (such as WMDs) is forbidden.