When Damar Hamlin collapsed, the NFL deployed its emergency action
Video Buffalo Bills safety Damar Hamlin remains in critical
Buffalo Bills' Damar Hamlin in critical condition after collapse
What Happened to Damar Hamlin? What We Know After Bills Player
Damar Hamlin Remains in Critical Condition as NFL Says Game Will
Explainer: What Happened to Buffalo Bills Player Damar Hamlin
Why did Damar Hamlin collapse?
Damar Hamlin: Buffalo Bills safety showing 'remarkable improvement
NFL player Damar Hamlin in critical condition after suffering