Chris Johnson seeking revival of Ice Bucket Challenge amid ALS diagnosis

Former Tennessee Titans and Arizona Cardinals running back Chris Johnson is calling for the revival of the Ice Bucket Challenge to raise awareness of ALS as he fights the progressive nervous system disease.

The Ice Bucket Challenge gained popularity in the summer of 2014 as a way to raise ALS awareness. People took a video or photo as they got a bucket of ice water dumped on them, and they'd challenge friends or relatives to do the same.

According to the ALS Therapy Development Institute, the drive helped raise an estimated $135 million in the United States and $220 million worldwide in the fight against ALS.