body {
    padding-top: 70px;
}

section {
    padding-top:70px;
    margin-top:-70px;
}

.leader {
    padding: inherit 10px;
}

.flex-container {
    display: flex;
    flex-flow: row wrap;
    justify-content: space-between;
}


.flex-item {
  margin: 10px auto;
}
body {
    padding-top: 70px;
}

section {
    padding-top:70px;
    margin-top:-70px;
}

.leader {
    background: #ffffff;
}

.flex-container {
    display: flex;
    flex-flow: row wrap;
    justify-content: space-between;
}


.flex-item {
  margin: 10px auto;
}
Change background of jumbotron to white
fix: Change background of jumbotron to white
