Saints Fans Invade St. Louis, Write Giant ‘WHO DAT’ Under Gateway Arch [PHOTO]

The New Orleans Saints are traveling to St. Louis to face the Rams in a Week 15 matchup on the gridiron, but it seems as if Black & Gold fans have already marked their territory in "The Lou" by writing a gigantic 'WHO DAT' in the snow below the city's iconic Gateway Arch.

This is just proof that win or lose, the New Orleans Saints have the best, and coolest fans in the NFL. Now, all we need is for Drew Brees and the rest of the team to leave their "mark" on the field tomorrow when the game kicks off at 3:25p.

Hey St. Louis, the 'WHO DAT' Nation has invaded.