36 U.S. Code § 301 - National anthem

There is no debate it is the law.
Also of note, when we held colors in foreign ports even they respected our Flag. Too bad the most blessed people (talent and money wise) in our country elect to kneel as some sort of protest against how some people are treated in our country. I do not see why they cannot go out and do something substantive to change the situation. Each one of these athletes could have a huge impact on inner city youth trapped in the never ending cycle of violence by participating in activities like Big Brother, CASA, and other local organizations.