The 25-year-old rapper certainly had his differences with other artists, industry bosses and street soldiers -- disputes that may have ultimately led to his death 20 years ago on Sept. 13, 1996 -- but if you ask some of those who were with 'Pac during the final months of his life, they tell a different story. Tupac's unreleased and unfinished album known as One Nation intended to show the rap industry, and perhaps the world, that rappers from opposite coasts could work together.