White NFL players show support for teammates protesting national anthem, First Take
Colin Kaepernick: How taking a knee started after NFL quarterback met Nate Boyer, NFL News
Here's why current, former Bengals players say they didn't take a knee during anthem
Majority of voters say NFL players kneeling is not unpatriotic - POLITICO
Fact check: Did Tim Tebow kneeling for God on the field upset the NFL?
What Colin Kaepernick Started - The New York Times
PHOTOS: NFL Players kneel in protest during the National Anthem
Despite Donald Trump's stand, some leaders now support NFL players kneeling during national anthem
NFL protests: 2 years of NFL protests, explained - Vox
NFL says players' protests during national anthem should be allowed - BBC News
How Fans Are Reacting to the NFL Anthem Protests - Sports Illustrated
What Does It Mean When Athletes Kneel During the National Anthem in the Age of Trump?