In 1959, photographer Bruce Davidson, then 25, embedded himself in a gang of New Yorkers to capture the essence of postwar inner-city youth culture.
After visiting Los Angeles' Maravilla Park, photographer Janette Beckman got to know a Mexican-American gang there and set about capturing a different side to their community.
At the age of 23, photographer Philippe Chancel embedded himself with two rockabilly gangs who lived life on the edge. Now, over 35 years later, the images have finally come to light.
The United Borders Project is uniting young people from two rival areas in Harlesden – bringing them together through music, mentoring and media classes.
The uniformed street gangs who inspired The Warriors were violent pillars of community identity, before being destroyed by gentrification and the drug trade.