.col-md-9 {
    height: 50vh;
    padding: 0;
}

h2 {
    text-align: center;

}

.col-md-3 {
    height: 25vh;
    padding: 0;
}

.photo .img {
    min-height: 25vh;
    width: 100%;
    height: 100%;
    background-position: center center;
    background-size: cover;
}

.photo:nth-child(5) {
    clear: both;
}