EXPLAINER: What happened to Damar Hamlin?


              Cincinnati Bengals wide receiver Tee Higgins (85) collides with Buffalo Bills safety Damar Hamlin (3) during the first half of an NFL football game, Monday, Jan. 2, 2023, in Cincinnati. Hamlin was injured on the play. Tonight's Buffalo Bills-Cincinnati Bengals game has been postponed after Buffalo Bills' Damar Hamlin collapsed, NFL Commissioner Roger Goodell announced. (AP Photo/Joshua A. Bickel)
            
              Cincinnati Bengals wide receiver Tee Higgins (85) runs near Buffalo Bills safety Damar Hamlin (3) during the first half of an NFL football game, Monday, Jan. 2, 2023, in Cincinnati. Hamlin was injured on the play. The game has been postponed after Buffalo Bills' Damar Hamlin collapsed, NFL Commissioner Roger Goodell announced. (AP Photo/Joshua A. Bickel)
            
              Buffalo Bills safety Damar Hamlin (3) lies on the turf after making a tackle on Cincinnati Bengals wide receiver Tee Higgins, blocked from view, as Buffalo Bills linebacker Tremaine Edmunds (49) assists at the end of the play during the first half of an NFL football game between the Cincinnati Bengals and the Buffalo Bills, Monday, Jan. 2, 2023, in Cincinnati. After getting up from the play, Hamlin collapsed and was administered CPR on the field. (AP Photo/Joshua A. Bickel)
            
              Cincinnati Bengals wide receiver Tee Higgins (85) collides with Buffalo Bills safety Damar Hamlin (3) during the first half of an NFL football game, Monday, Jan. 2, 2023, in Cincinnati. Hamlin was injured on the play. Tonight's Buffalo Bills-Cincinnati Bengals game has been postponed after Buffalo Bills' Damar Hamlin collapsed, NFL Commissioner Roger Goodell announced. (AP Photo/Joshua A. Bickel)
            
              Cincinnati Bengals wide receiver Tee Higgins (85) collides with Buffalo Bills safety Damar Hamlin (3) during the first half of an NFL football game, Monday, Jan. 2, 2023, in Cincinnati. Hamlin was injured on the play. Tonight's Buffalo Bills-Cincinnati Bengals game has been postponed after Buffalo Bills' Damar Hamlin collapsed, NFL Commissioner Roger Goodell announced. (AP Photo/Joshua A. Bickel)
            
              Cincinnati Bengals wide receiver Tee Higgins (85) runs near Buffalo Bills safety Damar Hamlin (3) during the first half of an NFL football game, Monday, Jan. 2, 2023, in Cincinnati. Hamlin was injured on the play. The game has been postponed after Buffalo Bills' Damar Hamlin collapsed, NFL Commissioner Roger Goodell announced. (AP Photo/Joshua A. Bickel)
            
              Buffalo Bills safety Damar Hamlin (3) lies on the turf after making a tackle on Cincinnati Bengals wide receiver Tee Higgins, blocked from view, as Buffalo Bills linebacker Tremaine Edmunds (49) assists at the end of the play during the first half of an NFL football game between the Cincinnati Bengals and the Buffalo Bills, Monday, Jan. 2, 2023, in Cincinnati. After getting up from the play, Hamlin collapsed and was administered CPR on the field. (AP Photo/Joshua A. Bickel)
            
              Cincinnati Bengals wide receiver Tee Higgins (85) collides with Buffalo Bills safety Damar Hamlin (3) during the first half of an NFL football game, Monday, Jan. 2, 2023, in Cincinnati. Hamlin was injured on the play. Tonight's Buffalo Bills-Cincinnati Bengals game has been postponed after Buffalo Bills' Damar Hamlin collapsed, NFL Commissioner Roger Goodell announced. (AP Photo/Joshua A. Bickel)
            
              Buffalo Bills quarterback Josh Allen (17) pauses as Damar Hamlin is examined during the first half of an NFL football game against the Cincinnati Bengals, Monday, Jan. 2, 2023, in Cincinnati. (AP Photo/Jeff Dean)
            
              Buffalo Bills' Siran Neal (33) and Nyheim Hines react after teammate Damar Hamlin was injured during the first half of an NFL football game against the Cincinnati Bengals, Monday, Jan. 2, 2023, in Cincinnati. (AP Photo/Jeff Dean)
EXPLAINER: What happened to Damar Hamlin?