NFL protests: 2 years of NFL protests, explained - Vox
3 years after Kaepernick took a knee, the NFL is back to business as usual - Vox
U.S. national anthem kneeling protests - Wikipedia
Still Processing: Take a Knee if You Agree - The New York Times
The Latest: At least 100 NFL players kneel or sit in protest
NFL players make league-wide demonstrations during national anthem after Trump comments
Per report: Arthur Blank to join players on the sideline during the national anthem - The Falcoholic
NFL players defy Trump in protest feud
Rev. Al Sharpton rips Jerry Jones' threats to bench NFL protesters as 'plantation mentality' after Jemele Hill suspended from ESPN – New York Daily News
National Anthem Notebook: Steelers, Titans and Seahawks No-shows – NBC10 Philadelphia
Pittsburgh Steelers reportedly to stay in the locker room for national anthem
NBC/WSJ poll: Majority say kneeling during anthem 'not appropriate'
Trump tweet, NFL response escalate drama of Sunday games
52% white Americans oppose kneeling during national anthem