With an endowment larger than all but four of the world's largest hedge funds, the Bill & Melinda Gates Foundation is easily one of the most powerful charities in the world. According to its website, the organization "works to help all people lead healthy, productive lives." So how do the investments of the foundation's $36 billion investing arm, the Gates Foundation Trust, match up to its mission? We dug into the group's recently released 2012 tax returns to find out. - [ READ MORE ]