Pete Frates, the former college baseball star who helped inspire the viral Ice Bucket Challenge, has died.
Mr. Frates had been fighting amyotrophic lateral sclerosis (ALS), also known as motor neurone disease or Lou Gehrig's disease, since being diagnosed in 2012.
He died Monday at the age of 34, surrounded by his family.
The Ice Bucket Challenge generated millions in donations and helped fund important research into the disease.
To complete the challenge, people would dump a bucket of ice water over their heads and post the video to social media, challenging others to do the same or make a donation to ALS research.
More than 17 million people uploaded videos to Facebook.
The challenge drew high-profile participants like former US President George W. Bush, Oprah Winfrey, Lady Gaga and President Donald Trump, as well as Usain Bolt and several Jamaican politicians.