ACCEPTING A CHILLY CHALLENGE: The MGH ALS Multidisciplinary Clinic and the Northeast ALS Consortium happily applaud after participating in the Ice Bucket Challenge on Aug. 8. The social media movement – aimed at raising awareness for Amyotrophic Lateral Sclerosis (ALS) – has become so popular it has literally soaked the nation, reaching politicians, professional athletes and celebrities. The rules are simple. Participants have 24 hours to douse themselves with a bucket of ice water and then challenge someone else to do the same – all communicated and shared via social media videos. If a tagged person does not complete the challenge, he or she must donate to a charity, preferably one that fights ALS. The movement was started by Pete Frates, a Beverly resident and former Boston College baseball player who was diagnosed with the progressive neurodegenerative disease in 2012. To support ALS research at the MGH visit http://mgh.to/alschallenge.