By GREGORY N. HEIRES

The seventh annual Labor Unite! Film Festival opens  in the Tribeca neighborhood in Manhattan on May 4.

The opening will feature “The Iron Triangle,” which explores the history of deindustrialization, urban renewal and gentrification in New York City.

The evening also includes three other screenings:

• “Bullies,” a five minute animated film that highlights how the Real Estate Board of New York has harmed New York City,
• “The Cost of Construction,” a documentary about death on the job, and
• “Bowery Tenants Fight Back,” a short film about gentrification in Chinatown.

The films will be shown at Cinema Village at 22 East 12th St. in Lower Manhattan.

The festival opening includes a reception at 6 p.m. The program will begin at 6:30 p.m.

After the viewings, Joshua Barnett, president of Local 375’s chapter at the New York City Housing Authority and a member of the New York Labor History Association, will lead a discussion about the films. The New York Labor History Association and LaborArts are the co-sponsors of the event.

Tickets may be purchased at the festival’s website, which has a schedule of the films, which run throughout May into June.