Charles Sykes / AP Photo

You don't hear about amyotrophic lateral sclerosis, also known as Lou Gehrig’s disease, too often.

Only about one in 100,000 people contract ALS. That ratio included actor and playwright Sam Shepard, who died from the disease at age 73 late last month. 

Video: Watch George W. Bush Take ALS Ice Bucket Challenge

Aug 20, 2014
George W. Bush/Facebook

Former President George W. Bush took the ice bucket challenge then nominated former President Bill Clinton to do it next.