PolitiFact: A short history of the national anthem, protests and the NFL
The Latest: At least 100 NFL players kneel or sit in protest
Kneeling during national anthem shows signs of resurgence
NFL Passes Rule Fining Teams If They Do Not 'Show Respect' for Flag, Anthem, News, Scores, Highlights, Stats, and Rumors
NFL teams face fines over national anthem protests under new policy - The Boston Globe
NFL Owners Pledge Allegiance to the Dollar, Not the Flag - Okayplayer
NFL Sees Six Teams Remain In Locker Room For National Anthem – Deadline
Everything you need to know about NFL protests during the national anthem
NFL national anthem policy: Players on field must show 'respect'
Opinion: NFL's anthem policy enslaves black players and fans
How playing the national anthem less might make it mean more
There would be no NFL without black players. They can resist the anthem policy. - The Washington Post
NFL Sunday Social Activism Sees Several Teams Scramble For Anthem – Deadline
Trump says players who don't stand for anthem 'shouldn't be in the country' - ABC News