Get Facebook individual's profile picture?

I want to get someone's profile picture based on their objectID which I have stored into a variable called userID in my application. I have tried the following but it doesn't seem to display the picture:

    FBRequestConnection.startWithGraphPath(objectID, completionHandler: { (connection, result, error) -> Void in

        let url = NSURL(string: "http://ift.tt/1InoasS")
        let urlRequest = NSURLRequest(URL: url!)
        //Asynchronous request to display image
        NSURLConnection.sendAsynchronousRequest(urlRequest, queue: NSOperationQueue.mainQueue()) { (response:NSURLResponse!, data:NSData!, error:NSError!) -> Void in

            // Display the image
            let image = UIImage(data: data)
            let imageView = UIImageView(image: image)
            cell.individualImage = imageView
        }
    })

Unfortunately nothing displays. I have noticed that you can use the FBRequestConnection.startForMeWithCompletionHandler method and use the same code above to display the current user's profile picture which works fine but I want to display the profile picture based on object id I pass in, not just the current user's.