How to get activities from trello board

I have built a site that pulls the comments from Trello to show it on my site using this code:

    var resource = "cards/" + card.id + "/actions";
    Trello.get(resource, function(comments) {
            if(!$.isEmptyObject(comments)){
                    var commentStr="<div class='comments_c'>";
                    $.each(comments, function(c, cda){
                            //console.log(cda.data.text);
                            commentStr += "<p>"+cda.data.text+"</p>";
                            //addComments(cda.data.text);
                    });

                    commentStr += "</div>";
            }
            console.log(commentStr);

Now it works fine to pull the comments but it doesn't show the activity like "Sarah Hastings added this card to ". The api documentation doesn't talk about it and I am at a dead-end. We need it for reporting and looking for a way to get the activities (copied, moved, added) from Trello to our site. Any help is appreciated.