A new photo from Ruben Fleischer's The Gangster Squad was released in the latest issue of Entertainment Weekly, which offers our first look at co-stars Josh Brolin and Sean Penn. Take a look at the photo, and read what director Ruben Fleischer had to say about his 1940s crime drama, below.

Sean Penn and Josh Brolin in <strong><em>Gangster Squad</em></strong>

The Gangster Squad is based on a series of Los Angeles Times articles from 2008, which chronicle this special unit of the L.A.P.D. that was assembled to eliminated East Coast mobster elements from the City of Angeles in the late 1940s. Here's what director Ruben Fleischer had to say about The Gangster Squad's story.

"It's a good leaping-off point. We've taken some creative license but tried to stay true to the original story and characters as much as possible. O'Mara (Josh Brolin), our lead character, has just come back from fighting the Nazis with all these ideals after seeing America at its greatest. And he's come home and there's a gangster running his city. While he was gone, Mickey Cohen (Sean Penn) took over and he turned the streets of L.A. into a battle zone. In our story, O'Mara takes the lead of The Gangster Squad, a vigilante police force that fights the gangsters on their own terms, and the battle between them is for the future of Los Angeles: whether it's going to become corrupt and run by this bunch of gangsters or these guys who fought for these values and want L.A. to be the shining beacon on the west coast that it was always intended to be."

Ruben Fleischer has been shooting The Gangster Squad all over Los Angeles, and the filmmaker also discussed recreating 1940s L.A.

"These places don't exist anymore. We had to take blocks of streets and build period storefronts and recreate clubs that have been closed for years. The past two nights, we had a full tommy-gun battle inside the Chinese Theater with gangsters lighting off 50 rounds a minute. And then tonight and the next night, it's going to bleed out onto Hollywood Boulevard as our Gangster Squad retreats. We're going to have a full battle on one of the most famous streets in L.A. And staging a scene at the Griffith Park Observatory is just iconic because you instantly think of Rebel Without a Cause and all the great movies that have filmed there. On Monday, we were on the steps of City Hall with Nick Nolte. It's like going in a time machine when you go to the set."

The filmmaker also elaborated more on the photo above, which appears to feature Sean Penn's Mickey Cohen surrendering to Josh Brolin's O'Mara.

"Ultimately it's the story between these two guys. It's Josh and Sean who face off at the end after a big gun battle between The Gangster Squad and Cohen and his men. O'Mara catches up to Cohen and Sean mockingly says, 'Okay, copper, take me in.' It ends in a fistfight between Cohen and O'Mara, and it was a pretty epic sequence to film between Josh and Sean."

CLICK HERE to read Ruben Fleischer's full interview for The Gangster Squad.