Surprised you didn't pick this one:
1865 13th Amendment ratified
The 13th Amendment to the Constitution, officially ending the institution of slavery, is ratified. "Neither slavery nor involuntary servitude, except as a punishment for crime whereof the party shall have been duly convicted, shall exist within the United States, or any place subject to their jurisdiction." With these words, the single greatest change wrought by the Civil War was officially noted in the U.S. Constitution.
1995 Communications Decency Act wording finalized
After a long and heated debate, House and Senate committee members agreed on the final wording of the Communications Decency Act, which made it a crime to provide pornography to minors over the Internet. The act was voted into law as part of the sweeping Telecommunication Reform Act of 1996. The act would have required a number of online services to restructure their business models, many of which depended at least partly on a steady stream of sex chat. Because filtering technology could not easily distinguish racy adult chat from pornography, online services would have had to cut off that arm of their businesses. Civil rights groups immediately challenged the act, and exactly one year later, on December 6, 1996, the Supreme Court agreed to review the constitutionality of the act. In 1997, the act was declared unconstitutional.