             if annotation.isKindOfClass(MKCircle.self) {
                 pinView?.pinTintColor = MKPinAnnotationView.greenPinColor()
                 pinView?.canShowCallout = true
+                pinView?.rightCalloutAccessoryView = UIButton(type: .DetailDisclosure)
             } else {
                 pinView?.pinTintColor = MKPinAnnotationView.redPinColor()
                 pinView?.canShowCallout = false
+                pinView?.rightCalloutAccessoryView = nil
             }
             
             return pinView

    }

    // -
    func recalculateCircle() {
        if let first = first, second = second {
            if let circle = circle {

    @IBOutlet weak var resetButton: UIBarButtonItem!

    @IBAction func didTapFirstButton(sender: AnyObject) {
        if let coordinate = mapView.userLocation.location?.coordinate {
            replaceFirstWithCoordinate(coordinate)
        }
    }

    @IBAction func didTapSecondButton(sender: AnyObject) {
        if let coordinate = mapView.userLocation.location?.coordinate {
            replaceSecondWithCoordinate(coordinate)
        }
    }
    
