<div class="container">
  <div class="row">
    <div class="col-sm-4"></div>
    <img src="../src/img/whatever.jpg"/>
    <div class="col-sm-4"></div>
    <img src="../src/img/whatever.jpg"/>
    <div class="col-sm-4"></div>
    <img src="../src/img/whatever.jpg"/>
  </div>
  <div class="row" style="padding-top: 15px;">
    <div class="col-sm-4"></div>
    <img src="../src/img/whatever.jpg"/>
    <div class="col-sm-4"></div>
    <img src="../src/img/whatever.jpg"/>
    <div class="col-sm-4"></div>
    <img src="../src/img/whatever.jpg"/>
  </div>
</div>