Charles Nesson, a Harvard Law School professor, has launched a constitutional attack against the federal copyright law at the heart of lawsuits brought by the Recording Industry Association of America, or RIAA, against people who share songs online. Nesson initiated his challenge to the law after a federal judge in Boston asked his office to represent Joel Tenenbaum, a Boston University graduate student accused by the RIAA of downloading at least seven songs and making 816 songs a

