Has anyone fixed a crash with the mapkit?

I am new to programming, so if this is a simple question, please forgive me.

I am getting the following error in my console when my app tries to launch the location function:

fatal error: unexpectedly found nil while unwrapping an Optional value

I'm not sure what it means, or how to fix it. This is the line of code it highlights when it crashes:

var latitude: Double = location.coordinate.latitude

My full code is as follows: import UIKit import CoreLocation import MapKit

class LocationController: UIViewController, CLLocationManagerDelegate, MKMapViewDelegate {

let locationManager = CLLocationManager()


@IBOutlet var theMap: MKMapView!


var manager:CLLocationManager!
var myLocations: [CLLocation] = []


    override func viewDidLoad()
    {
        super.viewDidLoad()

        self.theMap.mapType = MKMapType.Standard
        self.theMap.showsUserLocation = true

        //self.theMap.removeAnnotations(self.theMap.annotations)





        locationManager.delegate = self
        locationManager.desiredAccuracy = kCLLocationAccuracyBest
        locationManager.requestAlwaysAuthorization()
        locationManager.startUpdatingLocation()


        let location = self.locationManager.location

        var latitude: Double = location.coordinate.latitude
        var longitude: Double = location.coordinate.longitude

        println("current latitude :: \(latitude)")
        println("current longitude :: \(longitude)")



    }

    override func didReceiveMemoryWarning()
    {
        super.didReceiveMemoryWarning()

    }


    //You have to override CLLocationManager.didUpdateLocations (part of CLLocationManagerDelegate) to get notified when the location manager retrieves the current location:

    func locationManager(manager: CLLocationManager!, didUpdateLocations locations: [AnyObject]!)
    {
        //-

        let location = locations.last as CLLocation

        let center = CLLocationCoordinate2D(latitude: location.coordinate.latitude, longitude: location.coordinate.longitude)
        let region = MKCoordinateRegion(center: center, span: MKCoordinateSpan(latitudeDelta: 0.01, longitudeDelta: 0.01))


        self.theMap.setRegion(region, animated: true)


        // Add an annotation on Map View
        var point: MKPointAnnotation! = MKPointAnnotation()

        point.coordinate = location.coordinate
        point.title = "Current Location"
        point.subtitle = "sub title"

        self.theMap.addAnnotation(point)

        //stop updating location to save battery life
        locationManager.stopUpdatingLocation()

    }






    func mapView(mapView: MKMapView!, viewForAnnotation annotation: MKAnnotation!) -> MKAnnotationView!
    {
    if !(annotation is MKPointAnnotation)
    {
    return nil
    }

    let reuseId = "test"

    var anView = mapView.dequeueReusableAnnotationViewWithIdentifier(reuseId)

    if anView == nil
    {
    anView = MKAnnotationView(annotation: annotation, reuseIdentifier: reuseId)
    anView.image = UIImage(named:"1.png")
    anView.canShowCallout = true
    }
    else
    {
    anView.annotation = annotation
    }

    return anView
    }




}

Does anyone have a suggestion on how I can fix this error?