Hundreds of people rallied outside of AT&T Stadium on Sunday night to "show solidarity with NFL players who are taking a knee for justice," according to the Texas Organizing Project's release.
Attendees wearing all black took a knee to support the movement in the NFL of players such as Colin Kaepernick, who have protested by taking a knee during the national anthem.
All Dallas Cowboys and Philadelphia Eagles stood for the national anthem during the pregame rendition as Dallas hosted the Eagles on Sunday Night Football.
The Cowboys have been one of six NFL teams who haven't had a player protest by kneeling or sitting during the pregame anthem.