[SalesForce] A list in a lightning component

I'm trying to display a list in a lightning component :
the component (Carousel.cmp)

<aura:component controller="CarouselController"  implements="forceCommunity:availableForAllPageTypes,force:appHostable,flexipage:availableForAllPageTypes">
<aura:attribute name="actualites" type="Actualite__c[]"/>
<aura:handler name="init" value="{!this}" action="{!c.doInit}"/>
<aura:iteration var="a" items="{!v.actualites}">
    {!a.Name} : {!a.Description__c}
</aura:iteration></aura:component>

the server side controller (CarouselController.apxc)

public with sharing class CarouselController {

@AuraEnabled
public static List<Actualite__c> getActualites(){
    List<Actualite__c> actualites = [select Id, Name, Description__c from Actualite__c];
    return actualites;
}

@AuraEnabled
public static Actualite__c getActualite(Id id){
    Actualite__c actualite = [select Id, Name, Description__c from Actualite__c WHERE Id = :id];
    return actualite;
} }

the client side controller (CarouselController.js)

({
doInit : function(component, event, helper) {
    var action = component.get("c.getActualites");

    action.setCallback(this, function(reponse){
        if(reponse.getState === "SUCCESS"){
            component.set("v.actualites", reponse.getReturnValue());
        }
    });

    $A.enqueueAction(action);
} })

I just try to display a dynamic list of Actualite__c but when I try to visualize it with my lightning application :

<aura:application >
<c:Carousel /></aura:application>

I just see a blank page…

Am I doing something wrong ?
Thank you