Roker and Pacino are two well-known actors. Al Roker is an American television personality, weather forecaster, actor, and author, best known as the longtime weather anchor on NBC's Today. Al Pacino is an American actor and filmmaker who has had a career spanning over five decades. He is best known for his roles in The Godfather trilogy and Scarface. ALS is an acronym for amyotrophic lateral sclerosis, a progressive neurodegenerative disease that affects nerve cells in the brain and the spinal cord.