PHOTOS: NFL players and owners take a knee in protest

After comments U.S. President Donald Trump made about one of their own, NFL players are linking arms and or taking a knee during the national anthem in stadiums across the country in protest.

During a rally in Alabama, Trump referenced 49ers quarterback Colin Kaepernick refusing to stand during the U.S. national anthem in protest of police brutality, saying that team owners should fire players who take a knee and “disrespect the American flag.”

.@realDonaldTrump attacks @NFL players protesting the national anthem at a rally in #Huntsville, #Alabama. #NFL #DonaldTrump 🗣 🏈🏈🏈 pic.twitter.com/u5EZffLFol

— Jay Gershbein (@JG_Report) September 23, 2017

A number of NFL players and owners are standing against his comments by linking arms and taking a knee in stadiums across the country.

Unity. pic.twitter.com/puD77lwORk

— New York Jets (@nyjets) September 24, 2017

Bigger than football. pic.twitter.com/3nMzaCdOhx

— Indianapolis Colts (@Colts) September 24, 2017

Many players on the Detroit @Lions took a knee today during the national anthem. ✊ #TakeTheKnee

📷: Getty pic.twitter.com/5AYVvIRooK

— Michael Skolnik (@MichaelSkolnik) September 24, 2017

Tom Brady during the anthem pic.twitter.com/F0oxVVJDg5

— SB Nation (@SBNation) September 24, 2017

Miami locks arms ahead of its game against the Jets (via @MiamiDolphins) pic.twitter.com/e04aP28vDp

— Sports Illustrated (@SInow) September 24, 2017

Unity. #KCvsLAC pic.twitter.com/70FtBYQ4a2

— #KCvsLAC (@Chargers) September 24, 2017

Is that @raylewis out there, too? Interesting. #TakeTheKnee pic.twitter.com/qoO9AYMmYU

— deray mckesson (@deray) September 24, 2017

The Bears, Patriots, Texans, and Lions sidelines during the national anthem pic.twitter.com/Y74ARlguTU

— SB Nation (@SBNation) September 24, 2017

Statement from #Patriots Chairman & CEO Robert Kraft: pic.twitter.com/f5DJeK0Woj

— New England Patriots (@Patriots) September 24, 2017

In response, Trump is calling for fans to boycott the NFL until “players stop disrespecting our flag and country.”