Military personnel in uniform are required to salute when they meet and recognize persons entitled (by grade) to a salute except when it is inappropriate or impractical (in public conveyances such as planes and buses, in public places such as inside theaters, or when driving a vehicle).
One notable player, Shawn Kemp, enrolled in college but never played any games due to personal problems. In 1989, a year after his high school graduation, he was drafted by the Seattle SuperSonics. He played 14 seasons in the NBA and was selected to 6 All-Star Games and 3 All-NBA Teams.
He went 29th overall to Charlotte in the 1990 Draft. I was surprised to see he had an eight year NBA career with Seattle, Charlotte, Sacramento, and Denver, but he never played more than 40 games in a season. So the draft has been up and down for Purdue, but there is hope yet for Octeus.