#bells {
    padding: 100px 0;
    background-image: url(../../images/bzwdh/bzwdh_afghanistan_hashmatkhanlake.jpg);
    opacity: 0.5;
    background-attachment: fixed;
    background-position: center;
    background-repeat: no-repeat;
    background-size: cover;
        }

#header {
    height: 100vh;
    background-image: url(../../images/cities/city_afghanistan_kabul_01.jpg);
    background-position: center;
    background-size: cover;
        }