The Attica Prison riot took place at the state prison in Attica, New York; it started on September 9, 1971, and ended on September 13 with the highest number of fatalities in the history of United States prison uprisings. From Wikipedia
‘One to One: John & Yoko,’ now in theaters and IMAX, explores the couple’s activism, artistry, and personal struggles during a year of political and cultural upheaval.