跨越行右侧img元素的bootstrap框

Question

我的响应式网格系统存在一些问题。

http://imageshack.com/a/img537/9687/4H48G0.jpg

http://imageshack.com/a/img539/8265/ANvr0Y.jpg - 问题在这里

我的源代码：

CSS

<style type="text/css"> 
        .wrapper {

          height: 100%;

        text-align: center;

          margin: 0 auto;
        }
        img { max-width:100% !important;
            height:auto;
            display:block;
          }
        .text { 
            color: #fff;
            text-shadow:0px 2px 10px #000;
            height: 100%;
            left: 0;
            position: absolute;
            text-align: center;
            top: 0;
            font-size: 22px;
            width: 100%;}
        .box {
            border: 1px dashed #000;
            overflow: hidden;
            position: relative;
        }

        .tb_floater {
            font-size: 1.5em;
            margin-top: 20%;
            padding-top: 10%;

        }
        .box.tall {
            height: 300px;
        }
        .box.tall > a > img {
            height: auto;
        }
        </style>

HTML

<div class="wrapper">
    <div class="container">
    <div class="row">
        <div class="col-md-4 box tall">
        <a href="#">
            <img src="http://www.websailer.com/wp-content/uploads/2013/07/www_image.jpg">
            </a>
        <div class="text tall">
          <div class="tb_floater">
            <p>Loren ipsum shit amet<br/>Loren ipsum</p>
          </div>
    </div>
   </div>

      <div class="col-xs-6 col-md-6 box" style="height:150px;">.col-xs-6 .col-md-6</div>
    <div class="col-xs-6 col-md-2 box" style="height:150px;">.col-xs-6 .col-md-2</div>
    <div class="col-xs-6 col-md-2 box" style="height:150px;">.col-xs-6 .col-md-2</div>
      <div class="col-xs-6 col-md-6 box" style="height:150px;">.col-xs-6 .col-md-6</div>

</div>
  <div class="row">
<div class="pull-right col-xs-6 col-md-4 box tall">
      <a href="#">
          <img src="http://www.websailer.com/wp-content/uploads/2013/07/www_image.jpg">
          </a>
        <div class="text tall">
          <div class="tb_floater">
            <p>Loren ipsum shit amet<br/>Loren ipsum</p>
          </div>
        </div>
</div>


       <div class="col-xs-6 col-md-2 box" style="height:150px;">.col-xs-6 .col-md-6</div>
      <div class="col-xs-6 col-md-6 box" style="height:150px;">.col-xs-6 .col-md-2</div> 
      <div class="col-xs-6 col-md-2 box" style="height:150px;">.col-xs-6 .col-md-6</div>
      <div class="col-xs-6 col-md-6 box" style="height:150px;">.col-xs-6 .col-md-2</div>


</div>

当我调整浏览器大小时，那个空字段是个问题，任何解决方案？