How do you choose your last day on Earth? When George Gallegos was diagnosed with ALS, he found himself facing a grim future with a disease that slowly kills the muscles in a person’s body. But with the passing of Colorado's End of Life Options Act, he suddenly had a choice: to die from his disease or to take life-ending medication. NBC News spent the last three months of his life with him to capture the visible struggles of ALS and George’s inner conflict to decide his last day.