$.getJSON("http://api.flickr.com/services/feeds/photos_public.gne?id=56241641@N00&lang=es-us&format=json&jsoncallback=?",
  function(data){ 
     $.each(data.items, function(i,item){
      $("#imgs").append("<li><a href='"+ item.link +"' target='_blank'><img alt='"+ item.title +"' src='" + item.media.m + "'/></a></li>");	
	  if ( i == 11 ) return false;  	   
     });
  });