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.
The player drafted has NO say in who he will play for. He does have a say in if he will play. If he says he will not sign a contract unless they guarantee that they will trade him, it severely deflates the 'price' that can be gotten. His contract rights are held by the drafting team, for one year. If no contract is signed, every team is free to draft him the next year.