div.leftperson {
  clear: left; 
  width: 48%;
  float: left;
  margin-bottom: 1em;
}

div.leftperson img {
  float: left;
  border: 1px solid black;
  margin: 0 0.5em 0 0;
}

div.rightperson {
  width: 48%;
  float: right;
  clear: right;   
  margin-bottom: 1em;
  text-align: right;
}

div.rightperson img {
  float: right;
  border: 1px solid black;
  margin: 0 0 0 0.5em;
}