Fans booed New Orleans Saints players who knelt before the presentation of the American flag and the singing of the national anthem Sunday at the Mercedes-Benz Superdome. 

The boos rang down during a moment of silence for fallen NOPD officer Marcus McNeil, who was killed in the line of duty Friday.

The photo that accompanies the article on shows one player kneeling in a head-bowed positon that indicates he could be praying.

The fans cheered when the players stood before the anthem.