Two summers ago, the ALS Ice Bucket Challenge took the internet by storm, raising millions for a disease that, before all those dousings, mostly flew under the radar. ALS, also known as Lou Gehrig's disease, strikes roughly 6,000 Americans per year. For those people, and their families and friends, it's a nightmare diagnosis; a disease that, generally over a few years, robs one of the ability to move, to eat, to speak and ultimately to breathe.