img.group-img-header {
    width: 100%;
    position: absolute;
    margin: auto;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
  }
  .lead {
    height: 60px;
  }
  .panel-thumbnail {
    height: 250px;
    position:relative;
  }
  @media only screen and (max-width : 1200px) {
    img.group-img-header, div.panel-thumbnail { height: auto; position: relative;}
    .lead { height: auto;}
  }

  /* Medium Devices, Desktops */
  @media only screen and (max-width : 992px) {
    img.group-img-header, div.panel-thumbnail { height: auto; position: relative;}
    .lead { height: auto;}
  }