A US teenager's heartfelt online message of appreciation to his dad is going viral.
Charles Brockman III posted two photos side by side, one of his dad, Charles Brockman II, walking him to school on the first day of kindergarten, and another one, taken 13 years later, showing his dad walking him to his college dorm room earlier this week.
"From the first day of kindergarten to college move in. Thank you dad," the boy posted.
The tweet was posted on Monday and has been retweeted more than 64,000 times and liked more than 263,000 times.